* src/input/stream.c: fixed detection of EOF.

always restarts from the start :(

    - dvd, dvdread, dvdplay, vcdx, cddax
    - gtk, gnome, qt, kde
   There are others in this case, specially interface that I can't test.

- added last resort built-in mediatype for capture filter if card does not returns any (i.e Osprey cards)
- miscelaneous clean ups

  - take into account !rtpSource (for UDP support)