Allow the '-' character in an access' name (fixes parsing of input...

Allow the '-' character in an access' name (fixes parsing of input "http/shout-winamp://www.shoutcast.com/sbin/newxml.phtml").

src/input/input.c

@@ -2582,7 +2582,7 @@ static inline vlc_bool_t IsValidAccess( const char *psz )
         if( c == ':' )
             return VLC_TRUE;
 
-        if( ( !isascii( c ) || !isalnum( c ) ) && ( c != '/' ) )
+        if( ( !isascii( c ) || !isalnum( c ) ) && c != '-' && ( c != '/' ) )
             return VLC_FALSE;
         psz++;
     }