gst-plugins-good/gst/rtp/: Fixed payload range in payloder caps. Removed payload range completly from depayloaders as...

Original commit message from CVS:
2005-12-14  Philippe Khalaf  <burger@speedy.org>

* gst-plugins-good/gst/rtp/gstasteriskh263.c:
* gst-plugins-good/gst/rtp/gstrtpamrdepay.c:
* gst-plugins-good/gst/rtp/gstrtpamrpay.c:
* gst-plugins-good/gst/rtp/gstrtpg711depay.c:
* gst-plugins-good/gst/rtp/gstrtpg711depay.c:
* gst-plugins-good/gst/rtp/gstrtpgsmdepay.c:
* gst-plugins-good/gst/rtp/gstrtph263pay.c:
* gst-plugins-good/gst/rtp/gstrtph263pdepay.c:
* gst-plugins-good/gst/rtp/gstrtph263ppay.c:
* gst-plugins-good/gst/rtp/gstrtpmp4vdepay.c:
* gst-plugins-good/gst/rtp/gstrtpmp4vpay.c:
* gst-plugins-good/gst/rtp/gstrtpmpadepay.c:
* gst-plugins-good/gst/rtp/gstrtpmpapay.c:
* gst-plugins-good/gst/rtp/README:
Fixed payload range in payloder caps. Removed payload range completly from
depayloaders as they don't require payload type in their caps. In effect,
there isn't any specific payload type for any given codec, only suggestions.
Fixes bug #324011.