we ever need to reborn vlc_reduce for some unanticipated reason

* implemented the streaming-method-tab correctly (forgot that previously...)
* implemented MRL-composition when transcoding (still needs to be done for streaming)
* fixed various other stuff here and there

not usable yet - work will be continued after July 21th

(refs #13)

(still big enough for a pure 256-bits architecture...)

(local account needed, but possibly not same user as VLC)

* finished the gui and implemented correct encap-format-selection when transcoding (refs #13) -- still not usable

   program= and es= for the same destination.

    and are just to be utterly ignored otherwise.

Add the "X" deinterlace mode to the list displayed in guis. (We should certainly find a better name, but I cannot see any).

- Fix unitialised value

According to valgrind there's still an unitialized value at line 2343

(even on gcc-2.95 seems to accept the flag)