routerrpc: check payaddr before using for probing #15871

Job	Run time
lint code	3m 48s
cross compilation	30m 20s
check commits	3m 9s
check pinned dependencies (google.golang.org/grpc v1.59.0)	3s
run macOS itest	48m 21s
check pinned dependencies (github.com/golang/protobuf v1.5.3)	4s
check release notes updated	3s
RPC and mobile compilation check	1m 52s
sample configuration check	43s
Sqlc check	21s
run unit tests (btcd unit-cover)	17m 39s
run ubuntu itests (btcd, backend=btcd cover=1)	30m 16s
run unit tests (unit tags="kvdb_etcd")	19m 44s
run windows itest	40m 40s
run ubuntu itests (bitcoind, backend=bitcoind cover=1)	39m 2s
run unit tests (unit tags="kvdb_postgres")	18m 46s
run ubuntu itests (bitcoind-notxindex, backend="bitcoind notxindex")	39m 46s
run unit tests (unit tags="kvdb_sqlite")	17m 9s
run ubuntu itests (bitcoind-rpcpolling, backend="bitcoind rpcpolling" cover=1)	39m 20s
run unit tests (btcd unit-race)	36m 43s
run ubuntu itests (bitcoind-etcd, backend=bitcoind dbbackend=etcd)	54m 8s
run unit tests (unit-module)	1m 3s
run ubuntu itests (bitcoind-postgres, backend=bitcoind dbbackend=postgres)	1h 13m 37s
run ubuntu itests (bitcoind-sqlite, backend=bitcoind dbbackend=sqlite)	41m 3s
run ubuntu itests (bitcoind-postgres-nativesql, backend=bitcoind dbbackend=postgres nativesql=true)	1h 12m 43s
run ubuntu itests (bitcoind-sqlite-nativesql, backend=bitcoind dbbackend=sqlite nativesql=true)	41m 14s
run ubuntu itests (neutrino, backend=neutrino cover=1)	36m 56s
finish	3s
	11h 48m 36s

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