Fix sig/mgmt/Addr

[lukedirtwalker]

We can't use UDPAddr on the wire format, instead use hostinfo again.

Fixes tests broken by #3370

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This change is 

[lukedirtwalker]

Reviewable status: 0 of 5 files reviewed, 1 unresolved discussion

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go/sig/mgmt/addr.go, line 30 at r1 (raw file):

type Addr struct {
	Ctrl      *net.UDPAddr

alternatively we could introduce a wire type for net.UDPAddr?
The problem is the IP field in net.UDPAddr it maps to iP in capnp.

[scrye]

Reviewed 5 of 5 files at r1.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @lukedirtwalker)

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go/sig/mgmt/addr.go, line 30 at r1 (raw file):

Previously, lukedirtwalker (Lukas Vogel) wrote…

alternatively we could introduce a wire type for net.UDPAddr?
The problem is the IP field in net.UDPAddr it maps to iP in capnp.

Or we just move around a string... "192.168.0.0:60000" is a clean way of writing an address which is not subject to library specific encodings (e.g., Go sometimes encodes IPv4 addresses in 16 bytes, see net.IPv4, which causes havoc when talking to other processes)... And there are ways to encode both IPv4 and IPv6 via strings.