config file change! now 'port' is optional and 'db_file' is required!

also, should have better error reporting when failing to open playlist or
music directory's, or writing the db, etc

git-svn-id: https://svn.musicpd.org/mpd/trunk@3027 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/path.h

@@ -25,7 +25,7 @@
 
 extern char * musicDir;
 
-void initPaths(char * playlistDirArg, char * musicDirArg);
+void initPaths();
 
 void finishPaths();