Run gofmt -w -s *.go (#1408)

Signed-off-by: Miek Gieben <miek@miek.nl>

Signed-off-by: Miek Gieben <miek@miek.nl>

acceptfunc.go

@@ -19,7 +19,6 @@ type MsgAcceptFunc func(dh Header) MsgAcceptAction
 // * has more than 0 RRs in the Authority section
 //
 // * has more than 2 RRs in the Additional section
-//
 var DefaultMsgAcceptFunc MsgAcceptFunc = defaultMsgAcceptFunc
 
 // MsgAcceptAction represents the action to be taken.

client.go

@@ -431,7 +431,6 @@ func ExchangeContext(ctx context.Context, m *Msg, a string) (r *Msg, err error)
 //	co.WriteMsg(m)
 //	in, _  := co.ReadMsg()
 //	co.Close()
-//
 func ExchangeConn(c net.Conn, m *Msg) (r *Msg, err error) {
 	println("dns: ExchangeConn: this function is deprecated")
 	co := new(Conn)

doc.go

@@ -13,28 +13,28 @@ names in a message will result in a packing failure.
 Resource records are native types. They are not stored in wire format. Basic
 usage pattern for creating a new resource record:
 
-     r := new(dns.MX)
-     r.Hdr = dns.RR_Header{Name: "miek.nl.", Rrtype: dns.TypeMX, Class: dns.ClassINET, Ttl: 3600}
-     r.Preference = 10
-     r.Mx = "mx.miek.nl."
+	r := new(dns.MX)
+	r.Hdr = dns.RR_Header{Name: "miek.nl.", Rrtype: dns.TypeMX, Class: dns.ClassINET, Ttl: 3600}
+	r.Preference = 10
+	r.Mx = "mx.miek.nl."
 
 Or directly from a string:
 
-     mx, err := dns.NewRR("miek.nl. 3600 IN MX 10 mx.miek.nl.")
+	mx, err := dns.NewRR("miek.nl. 3600 IN MX 10 mx.miek.nl.")
 
 Or when the default origin (.) and TTL (3600) and class (IN) suit you:
 
-     mx, err := dns.NewRR("miek.nl MX 10 mx.miek.nl")
+	mx, err := dns.NewRR("miek.nl MX 10 mx.miek.nl")
 
 Or even:
 
-     mx, err := dns.NewRR("$ORIGIN nl.\nmiek 1H IN MX 10 mx.miek")
+	mx, err := dns.NewRR("$ORIGIN nl.\nmiek 1H IN MX 10 mx.miek")
 
 In the DNS messages are exchanged, these messages contain resource records
 (sets). Use pattern for creating a message:
 
-     m := new(dns.Msg)
-     m.SetQuestion("miek.nl.", dns.TypeMX)
+	m := new(dns.Msg)
+	m.SetQuestion("miek.nl.", dns.TypeMX)
 
 Or when not certain if the domain name is fully qualified:
 
@@ -45,17 +45,17 @@ records for the miek.nl. zone.
 
 The following is slightly more verbose, but more flexible:
 
-     m1 := new(dns.Msg)
-     m1.Id = dns.Id()
-     m1.RecursionDesired = true
-     m1.Question = make([]dns.Question, 1)
-     m1.Question[0] = dns.Question{"miek.nl.", dns.TypeMX, dns.ClassINET}
+	m1 := new(dns.Msg)
+	m1.Id = dns.Id()
+	m1.RecursionDesired = true
+	m1.Question = make([]dns.Question, 1)
+	m1.Question[0] = dns.Question{"miek.nl.", dns.TypeMX, dns.ClassINET}
 
 After creating a message it can be sent. Basic use pattern for synchronous
 querying the DNS at a server configured on 127.0.0.1 and port 53:
 
-     c := new(dns.Client)
-     in, rtt, err := c.Exchange(m1, "127.0.0.1:53")
+	c := new(dns.Client)
+	in, rtt, err := c.Exchange(m1, "127.0.0.1:53")
 
 Suppressing multiple outstanding queries (with the same question, type and
 class) is as easy as setting:
@@ -96,7 +96,7 @@ the Answer section:
 		// do something with t.Txt
 	}
 
-Domain Name and TXT Character String Representations
+# Domain Name and TXT Character String Representations
 
 Both domain names and TXT character strings are converted to presentation form
 both when unpacked and when converted to strings.
@@ -108,7 +108,7 @@ be escaped. Bytes below 32 and above 127 will be converted to \DDD form.
 For domain names, in addition to the above rules brackets, periods, spaces,
 semicolons and the at symbol are escaped.
 
-DNSSEC
+# DNSSEC
 
 DNSSEC (DNS Security Extension) adds a layer of security to the DNS. It uses
 public key cryptography to sign resource records. The public keys are stored in
@@ -117,12 +117,12 @@ DNSKEY records and the signatures in RRSIG records.
 Requesting DNSSEC information for a zone is done by adding the DO (DNSSEC OK)
 bit to a request.
 
-     m := new(dns.Msg)
-     m.SetEdns0(4096, true)
+	m := new(dns.Msg)
+	m.SetEdns0(4096, true)
 
 Signature generation, signature verification and key generation are all supported.
 
-DYNAMIC UPDATES
+# DYNAMIC UPDATES
 
 Dynamic updates reuses the DNS message format, but renames three of the
 sections. Question is Zone, Answer is Prerequisite, Authority is Update, only
@@ -133,30 +133,30 @@ certain resource records or names in a zone to specify if resource records
 should be added or removed. The table from RFC 2136 supplemented with the Go
 DNS function shows which functions exist to specify the prerequisites.
 
- 3.2.4 - Table Of Metavalues Used In Prerequisite Section
+	3.2.4 - Table Of Metavalues Used In Prerequisite Section
 
-  CLASS    TYPE     RDATA    Meaning                    Function
-  --------------------------------------------------------------
-  ANY      ANY      empty    Name is in use             dns.NameUsed
-  ANY      rrset    empty    RRset exists (value indep) dns.RRsetUsed
-  NONE     ANY      empty    Name is not in use         dns.NameNotUsed
-  NONE     rrset    empty    RRset does not exist       dns.RRsetNotUsed
-  zone     rrset    rr       RRset exists (value dep)   dns.Used
+	 CLASS    TYPE     RDATA    Meaning                    Function
+	 --------------------------------------------------------------
+	 ANY      ANY      empty    Name is in use             dns.NameUsed
+	 ANY      rrset    empty    RRset exists (value indep) dns.RRsetUsed
+	 NONE     ANY      empty    Name is not in use         dns.NameNotUsed
+	 NONE     rrset    empty    RRset does not exist       dns.RRsetNotUsed
+	 zone     rrset    rr       RRset exists (value dep)   dns.Used
 
 The prerequisite section can also be left empty. If you have decided on the
 prerequisites you can tell what RRs should be added or deleted. The next table
 shows the options you have and what functions to call.
 
- 3.4.2.6 - Table Of Metavalues Used In Update Section
+	3.4.2.6 - Table Of Metavalues Used In Update Section
 
-  CLASS    TYPE     RDATA    Meaning                     Function
-  ---------------------------------------------------------------
-  ANY      ANY      empty    Delete all RRsets from name dns.RemoveName
-  ANY      rrset    empty    Delete an RRset             dns.RemoveRRset
-  NONE     rrset    rr       Delete an RR from RRset     dns.Remove
-  zone     rrset    rr       Add to an RRset             dns.Insert
+	 CLASS    TYPE     RDATA    Meaning                     Function
+	 ---------------------------------------------------------------
+	 ANY      ANY      empty    Delete all RRsets from name dns.RemoveName
+	 ANY      rrset    empty    Delete an RRset             dns.RemoveRRset
+	 NONE     rrset    rr       Delete an RR from RRset     dns.Remove
+	 zone     rrset    rr       Add to an RRset             dns.Insert
 
-TRANSACTION SIGNATURE
+# TRANSACTION SIGNATURE
 
 An TSIG or transaction signature adds a HMAC TSIG record to each message sent.
 The supported algorithms include: HmacSHA1, HmacSHA256 and HmacSHA512.
@@ -239,7 +239,7 @@ Basic use pattern validating and replying to a message that has TSIG set.
 		w.WriteMsg(m)
 	}
 
-PRIVATE RRS
+# PRIVATE RRS
 
 RFC 6895 sets aside a range of type codes for private use. This range is 65,280
 - 65,534 (0xFF00 - 0xFFFE). When experimenting with new Resource Records these
@@ -248,7 +248,7 @@ can be used, before requesting an official type code from IANA.
 See https://miek.nl/2014/september/21/idn-and-private-rr-in-go-dns/ for more
 information.
 
-EDNS0
+# EDNS0
 
 EDNS0 is an extension mechanism for the DNS defined in RFC 2671 and updated by
 RFC 6891. It defines a new RR type, the OPT RR, which is then completely
@@ -279,9 +279,9 @@ SIG(0)
 
 From RFC 2931:
 
-    SIG(0) provides protection for DNS transactions and requests ....
-    ... protection for glue records, DNS requests, protection for message headers
-    on requests and responses, and protection of the overall integrity of a response.
+	SIG(0) provides protection for DNS transactions and requests ....
+	... protection for glue records, DNS requests, protection for message headers
+	on requests and responses, and protection of the overall integrity of a response.
 
 It works like TSIG, except that SIG(0) uses public key cryptography, instead of
 the shared secret approach in TSIG. Supported algorithms: ECDSAP256SHA256,

fuzz.go

@@ -1,3 +1,4 @@
+//go:build fuzz
 // +build fuzz
 
 package dns

listen_no_reuseport.go

@@ -1,3 +1,4 @@
+//go:build !go1.11 || (!aix && !darwin && !dragonfly && !freebsd && !linux && !netbsd && !openbsd)
 // +build !go1.11 !aix,!darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd
 
 package dns

listen_reuseport.go

@@ -1,3 +1,4 @@
+//go:build go1.11 && (aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd)
 // +build go1.11
 // +build aix darwin dragonfly freebsd linux netbsd openbsd
 

msg.go

@@ -680,9 +680,9 @@ func unpackRRslice(l int, msg []byte, off int) (dst1 []RR, off1 int, err error)
 
 // Convert a MsgHdr to a string, with dig-like headers:
 //
-//;; opcode: QUERY, status: NOERROR, id: 48404
+// ;; opcode: QUERY, status: NOERROR, id: 48404
 //
-//;; flags: qr aa rd ra;
+// ;; flags: qr aa rd ra;
 func (h *MsgHdr) String() string {
 	if h == nil {
 		return "<nil> MsgHdr"

parse_test.go

@@ -373,10 +373,10 @@ func TestNSEC(t *testing.T) {
 func TestParseLOC(t *testing.T) {
 	lt := map[string]string{
 		"SW1A2AA.find.me.uk.	LOC	51 30 12.748 N 00 07 39.611 W 0.00m 0.00m 0.00m 0.00m": "SW1A2AA.find.me.uk.\t3600\tIN\tLOC\t51 30 12.748 N 00 07 39.611 W 0m 0.00m 0.00m 0.00m",
-		"SW1A2AA.find.me.uk.	LOC	51 0 0.0 N 00 07 39.611 W 0.00m 0.00m 0.00m 0.00m": "SW1A2AA.find.me.uk.\t3600\tIN\tLOC\t51 00 0.000 N 00 07 39.611 W 0m 0.00m 0.00m 0.00m",
-		"SW1A2AA.find.me.uk.	LOC	51 30 12.748 N 00 07 39.611 W 0.00m": "SW1A2AA.find.me.uk.\t3600\tIN\tLOC\t51 30 12.748 N 00 07 39.611 W 0m 1m 10000m 10m",
+		"SW1A2AA.find.me.uk.	LOC	51 0 0.0 N 00 07 39.611 W 0.00m 0.00m 0.00m 0.00m":     "SW1A2AA.find.me.uk.\t3600\tIN\tLOC\t51 00 0.000 N 00 07 39.611 W 0m 0.00m 0.00m 0.00m",
+		"SW1A2AA.find.me.uk.	LOC	51 30 12.748 N 00 07 39.611 W 0.00m":                   "SW1A2AA.find.me.uk.\t3600\tIN\tLOC\t51 30 12.748 N 00 07 39.611 W 0m 1m 10000m 10m",
 		// Exercise boundary cases
-		"SW1A2AA.find.me.uk.	LOC	90 0 0.0 N 180 0 0.0 W 42849672.95 90000000.00m 90000000.00m 90000000.00m": "SW1A2AA.find.me.uk.\t3600\tIN\tLOC\t90 00 0.000 N 180 00 0.000 W 42849672.95m 90000000m 90000000m 90000000m",
+		"SW1A2AA.find.me.uk.	LOC	90 0 0.0 N 180 0 0.0 W 42849672.95 90000000.00m 90000000.00m 90000000.00m":  "SW1A2AA.find.me.uk.\t3600\tIN\tLOC\t90 00 0.000 N 180 00 0.000 W 42849672.95m 90000000m 90000000m 90000000m",
 		"SW1A2AA.find.me.uk.	LOC	89 59 59.999 N 179 59 59.999 W -100000 90000000.00m 90000000.00m 90000000m": "SW1A2AA.find.me.uk.\t3600\tIN\tLOC\t89 59 59.999 N 179 59 59.999 W -100000m 90000000m 90000000m 90000000m",
 		// use float64 to have enough precision.
 		"example.com. LOC 42 21 43.952 N 71 5 6.344 W -24m 1m 200m 10m": "example.com.\t3600\tIN\tLOC\t42 21 43.952 N 71 05 6.344 W -24m 1m 200m 10m",
@@ -532,7 +532,7 @@ func TestParseClass(t *testing.T) {
 		"t.example.com. CH A 127.0.0.1": "t.example.com.	3600	CH	A	127.0.0.1",
 		// ClassANY can not occur in zone files
 		// "t.example.com. ANY A 127.0.0.1": "t.example.com.	3600	ANY	A	127.0.0.1",
-		"t.example.com. NONE A 127.0.0.1": "t.example.com.	3600	NONE	A	127.0.0.1",
+		"t.example.com. NONE A 127.0.0.1":     "t.example.com.	3600	NONE	A	127.0.0.1",
 		"t.example.com. CLASS255 A 127.0.0.1": "t.example.com.	3600	CLASS255	A	127.0.0.1",
 	}
 	for i, o := range tests {
@@ -1515,10 +1515,10 @@ func TestParseSSHFP(t *testing.T) {
 
 func TestParseHINFO(t *testing.T) {
 	dt := map[string]string{
-		"example.net. HINFO A B": "example.net.	3600	IN	HINFO	\"A\" \"B\"",
+		"example.net. HINFO A B":         "example.net.	3600	IN	HINFO	\"A\" \"B\"",
 		"example.net. HINFO \"A\" \"B\"": "example.net.	3600	IN	HINFO	\"A\" \"B\"",
 		"example.net. HINFO A B C D E F": "example.net.	3600	IN	HINFO	\"A\" \"B C D E F\"",
-		"example.net. HINFO AB": "example.net.	3600	IN	HINFO	\"AB\" \"\"",
+		"example.net. HINFO AB":          "example.net.	3600	IN	HINFO	\"AB\" \"\"",
 		// "example.net. HINFO PC-Intel-700mhz \"Redhat Linux 7.1\"": "example.net.	3600	IN	HINFO	\"PC-Intel-700mhz\" \"Redhat Linux 7.1\"",
 		// This one is recommended in Pro Bind book http://www.zytrax.com/books/dns/ch8/hinfo.html
 		// but effectively, even Bind would replace it to correctly formed text when you AXFR
@@ -1538,9 +1538,9 @@ func TestParseHINFO(t *testing.T) {
 
 func TestParseCAA(t *testing.T) {
 	lt := map[string]string{
-		"example.net.	CAA	0 issue \"symantec.com\"": "example.net.\t3600\tIN\tCAA\t0 issue \"symantec.com\"",
+		"example.net.	CAA	0 issue \"symantec.com\"":            "example.net.\t3600\tIN\tCAA\t0 issue \"symantec.com\"",
 		"example.net.	CAA	0 issuewild \"symantec.com; stuff\"": "example.net.\t3600\tIN\tCAA\t0 issuewild \"symantec.com; stuff\"",
-		"example.net.	CAA	128 tbs \"critical\"": "example.net.\t3600\tIN\tCAA\t128 tbs \"critical\"",
+		"example.net.	CAA	128 tbs \"critical\"":                "example.net.\t3600\tIN\tCAA\t128 tbs \"critical\"",
 		"example.net.	CAA	2 auth \"0>09\\006\\010+\\006\\001\\004\\001\\214y\\002\\003\\001\\006\\009`\\134H\\001e\\003\\004\\002\\001\\004 y\\209\\012\\221r\\220\\156Q\\218\\150\\150{\\166\\245:\\231\\182%\\157:\\133\\179}\\1923r\\238\\151\\255\\128q\\145\\002\\001\\000\"": "example.net.\t3600\tIN\tCAA\t2 auth \"0>09\\006\\010+\\006\\001\\004\\001\\214y\\002\\003\\001\\006\\009`\\134H\\001e\\003\\004\\002\\001\\004 y\\209\\012\\221r\\220\\156Q\\218\\150\\150{\\166\\245:\\231\\182%\\157:\\133\\179}\\1923r\\238\\151\\255\\128q\\145\\002\\001\\000\"",
 		"example.net.   TYPE257	0 issue \"symantec.com\"": "example.net.\t3600\tIN\tCAA\t0 issue \"symantec.com\"",
 	}
@@ -1636,24 +1636,24 @@ func TestParseCSYNC(t *testing.T) {
 
 func TestParseSVCB(t *testing.T) {
 	svcbs := map[string]string{
-		`example.com. 3600 IN SVCB 0 cloudflare.com.`: `example.com.	3600	IN	SVCB	0 cloudflare.com.`,
+		`example.com. 3600 IN SVCB 0 cloudflare.com.`:                              `example.com.	3600	IN	SVCB	0 cloudflare.com.`,
 		`example.com. 3600 IN SVCB 65000 cloudflare.com. alpn=h2 ipv4hint=3.4.3.2`: `example.com.	3600	IN	SVCB	65000 cloudflare.com. alpn="h2" ipv4hint="3.4.3.2"`,
 		`example.com. 3600 IN SVCB 65000 cloudflare.com. key65000=4\ 3 key65001="\" " key65002 key65003= key65004="" key65005== key65006==\"\" key65007=\254 key65008=\032`: `example.com.	3600	IN	SVCB	65000 cloudflare.com. key65000="4\ 3" key65001="\"\ " key65002="" key65003="" key65004="" key65005="=" key65006="=\"\"" key65007="\254" key65008="\ "`,
 		// Explained in svcb.go "In AliasMode, records SHOULD NOT include any SvcParams,"
 		`example.com. 3600 IN SVCB 0 no-default-alpn`: `example.com.	3600	IN	SVCB	0 no-default-alpn.`,
 		// From the specification
-		`example.com.   HTTPS   0 foo.example.com.`: `example.com.	3600	IN	HTTPS	0 foo.example.com.`,
-		`example.com.   SVCB   1 .`: `example.com.	3600	IN	SVCB	1 .`,
-		`example.com.   SVCB   16 foo.example.com. port=53`: `example.com.	3600	IN	SVCB	16 foo.example.com. port="53"`,
-		`example.com.   SVCB   1 foo.example.com. key667=hello`: `example.com.	3600	IN	SVCB	1 foo.example.com. key667="hello"`,
-		`example.com.   SVCB   1 foo.example.com. key667="hello\210qoo"`: `example.com.	3600	IN	SVCB	1 foo.example.com. key667="hello\210qoo"`,
-		`example.com.   SVCB   1 foo.example.com. ipv6hint="2001:db8::1,2001:db8::53:1"`: `example.com.	3600	IN	SVCB	1 foo.example.com. ipv6hint="2001:db8::1,2001:db8::53:1"`,
-		`example.com.   SVCB   1 example.com. ipv6hint="2001:db8::198.51.100.100"`: `example.com.	3600	IN	SVCB	1 example.com. ipv6hint="2001:db8::c633:6464"`,
+		`example.com.   HTTPS   0 foo.example.com.`:                                                          `example.com.	3600	IN	HTTPS	0 foo.example.com.`,
+		`example.com.   SVCB   1 .`:                                                                          `example.com.	3600	IN	SVCB	1 .`,
+		`example.com.   SVCB   16 foo.example.com. port=53`:                                                  `example.com.	3600	IN	SVCB	16 foo.example.com. port="53"`,
+		`example.com.   SVCB   1 foo.example.com. key667=hello`:                                              `example.com.	3600	IN	SVCB	1 foo.example.com. key667="hello"`,
+		`example.com.   SVCB   1 foo.example.com. key667="hello\210qoo"`:                                     `example.com.	3600	IN	SVCB	1 foo.example.com. key667="hello\210qoo"`,
+		`example.com.   SVCB   1 foo.example.com. ipv6hint="2001:db8::1,2001:db8::53:1"`:                     `example.com.	3600	IN	SVCB	1 foo.example.com. ipv6hint="2001:db8::1,2001:db8::53:1"`,
+		`example.com.   SVCB   1 example.com. ipv6hint="2001:db8::198.51.100.100"`:                           `example.com.	3600	IN	SVCB	1 example.com. ipv6hint="2001:db8::c633:6464"`,
 		`example.com.   SVCB   16 foo.example.org. alpn=h2,h3-19 mandatory=ipv4hint,alpn ipv4hint=192.0.2.1`: `example.com.	3600	IN	SVCB	16 foo.example.org. alpn="h2,h3-19" mandatory="ipv4hint,alpn" ipv4hint="192.0.2.1"`,
-		`example.com.   SVCB   16 foo.example.org. alpn="f\\\\oo\\,bar,h2"`: `example.com.	3600	IN	SVCB	16 foo.example.org. alpn="f\\\092oo\\\044bar,h2"`,
-		`example.com.   SVCB   16 foo.example.org. alpn=f\\\092oo\092,bar,h2`: `example.com.	3600	IN	SVCB	16 foo.example.org. alpn="f\\\092oo\\\044bar,h2"`,
+		`example.com.   SVCB   16 foo.example.org. alpn="f\\\\oo\\,bar,h2"`:                                  `example.com.	3600	IN	SVCB	16 foo.example.org. alpn="f\\\092oo\\\044bar,h2"`,
+		`example.com.   SVCB   16 foo.example.org. alpn=f\\\092oo\092,bar,h2`:                                `example.com.	3600	IN	SVCB	16 foo.example.org. alpn="f\\\092oo\\\044bar,h2"`,
 		// From draft-ietf-add-ddr-06
-		`_dns.example.net. SVCB 1 example.net. alpn=h2 dohpath=/dns-query{?dns}`: `_dns.example.net.	3600	IN	SVCB	1 example.net. alpn="h2" dohpath="/dns-query{?dns}"`,
+		`_dns.example.net. SVCB 1 example.net. alpn=h2 dohpath=/dns-query{?dns}`:     `_dns.example.net.	3600	IN	SVCB	1 example.net. alpn="h2" dohpath="/dns-query{?dns}"`,
 		`_dns.example.net. SVCB 1 example.net. alpn=h2 dohpath=/dns\045query{\?dns}`: `_dns.example.net.	3600	IN	SVCB	1 example.net. alpn="h2" dohpath="/dns-query{?dns}"`,
 	}
 	for s, o := range svcbs {

svcb.go

@@ -563,15 +563,15 @@ func (s *SVCBPort) parse(b string) error {
 // to the hinted IP address may be terminated and a new connection may be opened.
 // Basic use pattern for creating an ipv4hint option:
 //
-//	h := new(dns.HTTPS)
-//	h.Hdr = dns.RR_Header{Name: ".", Rrtype: dns.TypeHTTPS, Class: dns.ClassINET}
-//	e := new(dns.SVCBIPv4Hint)
-//	e.Hint = []net.IP{net.IPv4(1,1,1,1).To4()}
+//		h := new(dns.HTTPS)
+//		h.Hdr = dns.RR_Header{Name: ".", Rrtype: dns.TypeHTTPS, Class: dns.ClassINET}
+//		e := new(dns.SVCBIPv4Hint)
+//		e.Hint = []net.IP{net.IPv4(1,1,1,1).To4()}
 //
-//  Or
+//	 Or
 //
-//	e.Hint = []net.IP{net.ParseIP("1.1.1.1").To4()}
-//	h.Value = append(h.Value, e)
+//		e.Hint = []net.IP{net.ParseIP("1.1.1.1").To4()}
+//		h.Value = append(h.Value, e)
 type SVCBIPv4Hint struct {
 	Hint []net.IP
 }

tools.go

@@ -1,3 +1,4 @@
+//go:build tools
 // +build tools
 
 // We include our tool dependencies for `go generate` here to ensure they're

udp.go

@@ -1,3 +1,4 @@
+//go:build !windows
 // +build !windows
 
 package dns

udp_test.go

@@ -1,3 +1,4 @@
+//go:build linux && !appengine
 // +build linux,!appengine
 
 package dns

udp_windows.go

@@ -1,3 +1,4 @@
+//go:build windows
 // +build windows
 
 package dns

xfr.go

@@ -44,7 +44,6 @@ func (t *Transfer) tsigProvider() TsigProvider {
 //	dnscon := &dns.Conn{Conn:con}
 //	transfer = &dns.Transfer{Conn: dnscon}
 //	channel, err := transfer.In(message, master)
-//
 func (t *Transfer) In(q *Msg, a string) (env chan *Envelope, err error) {
 	switch q.Question[0].Qtype {
 	case TypeAXFR, TypeIXFR: