fix(specid): match music dirs with trailing slash (#439)

* Fix bug with checking path prefixes

* slash instead

* double quote

* lint

* lint again

* ensure trailing slash when substring matching

---------

Co-authored-by: sentriz <senan@senan.xyz>

server/ctrlsubsonic/specidpaths/specidpaths.go

@@ -54,8 +54,9 @@ func Lookup(dbc *db.DB, musicPaths []string, podcastsPath string, path string) (
 
 	var musicPath string
 	for _, mp := range musicPaths {
-		if strings.HasPrefix(path, mp) {
+		if strings.HasPrefix(path, filepath.Clean(mp)+string(filepath.Separator) /* ensure trailing */) {
 			musicPath = mp
+			break
 		}
 	}
 	if musicPath == "" {