draft: Generate tls certificate with CA #16731

Job	Run time
check pinned dependencies (google.golang.org/grpc v1.59.0)	5s
check commits	5m 36s
check pinned dependencies (github.com/golang/protobuf v1.5.3)	5s
lint code	51s
cross compilation	30m 29s
run macOS itest	49m 22s
RPC and mobile compilation check	2m 3s
check release notes updated	4s
sample configuration check	41s
Sqlc check	2m 47s
run ubuntu itests (btcd, backend=btcd cover=1)	32m 19s
run unit tests (btcd unit-cover)	12m 44s
run ubuntu itests (bitcoind, backend=bitcoind cover=1)	40m 31s
run windows itest	7m 5s
run unit tests (unit tags="kvdb_etcd")	20m 41s
run ubuntu itests (bitcoind-notxindex, backend="bitcoind notxindex")	39m 54s
run unit tests (unit tags="kvdb_postgres")	20m 19s
run ubuntu itests (bitcoind-rpcpolling, backend="bitcoind rpcpolling" cover=1)	43m 5s
run unit tests (unit tags="kvdb_sqlite")	18m 26s
run ubuntu itests (bitcoind-etcd, backend=bitcoind dbbackend=etcd)	54m 39s
run unit tests (btcd unit-race)	40m 50s
run ubuntu itests (bitcoind-postgres, backend=bitcoind dbbackend=postgres)	1h 9m 54s
run unit tests (unit-module)	1m 4s
run ubuntu itests (bitcoind-sqlite, backend=bitcoind dbbackend=sqlite)	41m 37s
run ubuntu itests (bitcoind-postgres-nativesql, backend=bitcoind dbbackend=postgres nativesql=true)	1h 13m 25s
run ubuntu itests (bitcoind-sqlite-nativesql, backend=bitcoind dbbackend=sqlite nativesql=true)	43m 36s
run ubuntu itests (neutrino, backend=neutrino cover=1)	38m 59s
finish	5s
	11h 31m 16s

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