Only import playlists from configured paths in option PlaylistsPath. Closes #1181

Syntax is Ant-style Globs, with support for '**' (any subfolder). Default: '.:**' (or '.;**' in Windows`, meaning all folders and subfolders under `MusicFolder`

conf/configuration.go

@@ -32,6 +32,7 @@ type configOptions struct {
 	TranscodingCacheSize    string
 	ImageCacheSize          string
 	AutoImportPlaylists     bool
+	PlaylistsPath           string
 
 	SearchFullString       bool
 	RecentlyAddedByModTime bool
@@ -189,6 +190,7 @@ func init() {
 	viper.SetDefault("transcodingcachesize", "100MB")
 	viper.SetDefault("imagecachesize", "100MB")
 	viper.SetDefault("autoimportplaylists", true)
+	viper.SetDefault("playlistspath", consts.DefaultPlaylistsPath)
 	viper.SetDefault("enabledownloads", true)
 
 	// Config options only valid for file/env configuration