Fixes dialog size, add tooltip

Need to get command line options in vlc.c (ref #505)

You cannot create directory variable that way and expect it to work;
if you *actually* need a directory variable, it would have to be fooexecdir
rather than foodir otherwise automake thinks it's a data directory.

Rewrote internal RTCP to support multiple client connections. TODO: rtcp scheduling function, server socket, hooking it up with RTP stream_out connections.

win9x testers, raise your hand

contribs: force --target, --build and --host whether cross compiling or not to get around some configure script bugs

Doesn't lock the playlist if unneeded