This does not make any sense. Spaces are normally encoded as %20 (+ is for
query parameters values only).

Also fix variable shadowing.

Return an error code if the stream is not a directory (similar to
STREAM_GET_SIZE).

The demuxers that can this function predate directory/explicit playlist
support.

Also:
 - zip: fix seeking to end of file
 - accesstweaks: fix segmentation fault when (inhibiting) seeking
 - decomp: set callbacks only on successful init

gnomevfs has been deprecated for years.

This works like block_Realloc() but retains the original block in case
of failure.

This was a failed attempt to work-around performance problems with UDP
reception.

(This is not tested.)