Use request context when looking up PTR records for logging

log/log.go

@@ -23,7 +23,7 @@ func Request(next http.Handler, logger log.Logger) http.Handler {
 		}
 
 		// Try to figure out a name for the remote. If there are multiple, we select the first.
-		names, err := net.LookupAddr(remote)
+		names, err := net.DefaultResolver.LookupAddr(r.Context(), remote)
 		if err != nil {
 			// Can't resolve name, but that's ok. There might not be a PTR record for the remote.
 			names = []string{"n/a"}