multi: add SpewLogClosure to avoid code repetition

discovery/bootstrapper.go

@@ -14,7 +14,6 @@ import (
 
 	"github.com/btcsuite/btcd/btcec/v2"
 	"github.com/btcsuite/btcd/btcutil/bech32"
-	"github.com/davecgh/go-spew/spew"
 	"github.com/lightningnetwork/lnd/autopilot"
 	"github.com/lightningnetwork/lnd/lnutils"
 	"github.com/lightningnetwork/lnd/lnwire"
@@ -432,10 +431,7 @@ search:
 		}
 
 		log.Tracef("Retrieved SRV records from dns seed: %v",
-			lnutils.NewLogClosure(func() string {
-				return spew.Sdump(addrs)
-			}),
-		)
+			lnutils.SpewLogClosure(addrs))
 
 		// Next, we'll need to issue an A record request for each of
 		// the nodes, skipping it if nothing comes back.