fix: remove stream url from info logs

This solves the most prominent credential leak. With every new
connection the passwords were leaked to the logs visible in the UI as
well.

With this change only the stream name gets logged here.

There are other places in the codebase where we still log secret
embedded in URLs, but a lot of them lack access to the stream name they
could be replaced with. Most of these occurances are debug logs, but
some are warning level though. I can try to come up with a fix in a
followup PR.

This change is a simpler alternative to
AlexxIT#1219 to address the issue to rid
of the password in the log line emitted whenever a stream is created:

    [streams] create new stream url=rtsp://stream:xxxxxxxxxx@192.168.42.42:554/stream1

    [streams] create new stream garage-cam

internal/streams/streams.go

@@ -119,7 +119,7 @@ func GetOrPatch(query url.Values) *Stream {
 
 	// check if name param provided
 	if name := query.Get("name"); name != "" {
-		log.Info().Msgf("[streams] create new stream url=%s", source)
+		log.Info().Msgf("[streams] create new stream %s", name)
 
 		return Patch(name, source)
 	}
@@ -143,6 +143,8 @@ func Delete(id string) {
 	delete(streams, id)
 }
 
-var log zerolog.Logger
-var streams = map[string]*Stream{}
-var streamsMu sync.Mutex
+var (
+	log       zerolog.Logger
+	streams   = map[string]*Stream{}
+	streamsMu sync.Mutex
+)