multi: address funlen linter

These should be addressed in a refactor PR.

routing/pathfind.go

@@ -559,6 +559,8 @@ func getOutgoingBalance(ctx context.Context, node route.Vertex,
 // source. This is to properly accumulate fees that need to be paid along the
 // path and accurately check the amount to forward at every node against the
 // available bandwidth.
+//
+//nolint:funlen
 func findPath(ctx context.Context, g *graphParams, r *RestrictParams,
 	cfg *PathFindingConfig, self, source, target route.Vertex,
 	amt lnwire.MilliSatoshi, timePref float64, finalHtlcExpiry int32) (

rpcserver.go

@@ -4636,6 +4636,8 @@ func encodeCustomChanData(lnChan *channeldb.OpenChannel) ([]byte, error) {
 }
 
 // createRPCOpenChannel creates an *lnrpc.Channel from the *channeldb.Channel.
+//
+//nolint:funlen
 func createRPCOpenChannel(ctx context.Context, r *rpcServer,
 	dbChannel *channeldb.OpenChannel, isActive, peerAliasLookup bool) (
 	*lnrpc.Channel, error) {

server.go

@@ -491,6 +491,8 @@ func noiseDial(idKey keychain.SingleKeyECDH,
 
 // newServer creates a new instance of the server which is to listen using the
 // passed listener address.
+//
+//nolint:funlen
 func newServer(ctx context.Context, cfg *Config, listenAddrs []net.Addr,
 	dbs *DatabaseInstances, cc *chainreg.ChainControl,
 	nodeKeyDesc *keychain.KeyDescriptor,