[custom channels 5/5]: merge custom channel staging branch into master #15850

Job	Run time
lint code	4m 56s
check commits	15m 35s
cross compilation	11m 38s
check pinned dependencies (google.golang.org/grpc v1.59.0)	4s
run macOS itest	49m 15s
check pinned dependencies (github.com/golang/protobuf v1.5.3)	4s
check release notes updated	3s
RPC and mobile compilation check	2m 17s
sample configuration check	51s
Sqlc check	22s
run ubuntu itests (btcd, backend=btcd cover=1)	29m 41s
run unit tests (btcd unit-cover)	5m 36s
run windows itest	30m 49s
run ubuntu itests (bitcoind, backend=bitcoind cover=1)	38m 57s
run unit tests (unit tags="kvdb_etcd")	19m 33s
run ubuntu itests (bitcoind-notxindex, backend="bitcoind notxindex")	38m 15s
run unit tests (unit tags="kvdb_postgres")	18m 15s
run ubuntu itests (bitcoind-rpcpolling, backend="bitcoind rpcpolling" cover=1)	39m 50s
run unit tests (unit tags="kvdb_sqlite")	17m 4s
run ubuntu itests (bitcoind-etcd, backend=bitcoind dbbackend=etcd)	53m 11s
run unit tests (btcd unit-race)	36m 35s
run unit tests (unit-module)	1m 3s
run ubuntu itests (bitcoind-postgres, backend=bitcoind dbbackend=postgres)	1h 11m 28s
run ubuntu itests (bitcoind-sqlite, backend=bitcoind dbbackend=sqlite)	40m 24s
run ubuntu itests (bitcoind-postgres-nativesql, backend=bitcoind dbbackend=postgres nativesql=true)	1h 15m 10s
run ubuntu itests (bitcoind-sqlite-nativesql, backend=bitcoind dbbackend=sqlite nativesql=true)	40m 0s
run ubuntu itests (neutrino, backend=neutrino cover=1)	36m 14s
finish	9s
	11h 17m 19s

Provide feedback