validate url's before adding to playlist

git-svn-id: https://svn.musicpd.org/mpd/trunk@1289 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/inputStream.h

@@ -48,6 +48,8 @@ struct _InputStream {
         char * metaTitle;
 };
 
+int isUrlSaneForInputStream(char * url);
+
 /* if an error occurs for these 3 functions, then -1 is returned and errno
    for the input stream is set */
 int openInputStream(InputStream * inStream, char * url);