- Fixed TS input ( a nasty dead lock had appeared 4 days ago )

- Fixed TS input ( a nasty dead lock had appeared 4 days ago )
- Added base of network support

Things to be done :
- Meuuh : fix the PCR synchronisation so that we can set b_pace_cntrol to 0
- Sam : find a way of specifing the type of media (file, net). For the
moment, the "--input ts" always call input_NetworkOpen
- Maybe sam : for the moment the working syntax is vlc --input ts
servername, it should nbe turned into "vlc --server servername".

Things that don't work (i'll work on this this week end) :
- stopping and retaking a stream
- a nice 'waiting for stream'
- we select all incoming streams. we should be able to select.

Things that haven't been tested :
- broadcast
- only tested with one stream.

Kick me if something is broken by my fault.