lnwallet: allow opener to dip into its reserve. #15746

Job	Run time
Sqlc check	5m 4s
cross compilation	33m 35s
check commits	5m 26s
check pinned dependencies (google.golang.org/grpc v1.59.0)	3s
lint code	7m 29s
check pinned dependencies (github.com/golang/protobuf v1.5.3)	6s
RPC and mobile compilation check	5m 35s
sample configuration check	4m 4s
run ubuntu itests (btcd, backend=btcd cover=1)	31m 10s
run unit tests (btcd unit-cover)	4m 38s
run ubuntu itests (bitcoind, backend=bitcoind cover=1)	40m 38s
run unit tests (unit tags="kvdb_etcd")	19m 23s
run ubuntu itests (bitcoind-notxindex, backend="bitcoind notxindex")	40m 36s
run unit tests (unit tags="kvdb_postgres")	18m 19s
run ubuntu itests (bitcoind-rpcpolling, backend="bitcoind rpcpolling" cover=1)	40m 41s
run unit tests (unit tags="kvdb_sqlite")	17m 4s
run ubuntu itests (bitcoind-etcd, backend=bitcoind dbbackend=etcd)	55m 2s
run macOS itest	49m 46s
run unit tests (btcd unit-race)	35m 22s
run ubuntu itests (bitcoind-postgres, backend=bitcoind dbbackend=postgres)	1h 12m 54s
run ubuntu itests (bitcoind-sqlite, backend=bitcoind dbbackend=sqlite)	43m 55s
run unit tests (unit-module)	4m 56s
run ubuntu itests (bitcoind-postgres-nativesql, backend=bitcoind dbbackend=postgres nativesql=true)	1h 14m 14s
check release notes updated	5s
run ubuntu itests (bitcoind-sqlite-nativesql, backend=bitcoind dbbackend=sqlite nativesql=true)	44m 16s
run windows itest	37m 6s
run ubuntu itests (neutrino, backend=neutrino cover=1)	38m 39s
finish	7s
	12h 10m 13s

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