fix example config, use cfgfs for database

package/mpd/files/mpd.conf

@@ -1,8 +1,8 @@
 # An example configuration file for MPD
 user				"mpd"
 music_directory			"/music"
-playlist_directory		"~/playlists"
-db_file				"~/.database"
+playlist_directory		"/etc/mpd/playlists"
+db_file				"/etc/mpd/database"
 pid_file			"/var/run/mpd/mpd.pid"
 log_file			"syslog"
 # An example of an ALSA output