capmt: add webui oscam mode
capmt: add simplified OSCam dvbapi protocol as new capmt mode

The new mode uses one domain socket connection for all subscribed
services. The CA_SET_PID and CA_SET_DESCR are received over same
socket connection instead of one UDP socket per adapter.

The minimum OSCam version for use with this mode is svn rev 9063.
capmt: fix numbering services after a686fe3

The commit fixes simultaneous channel decryption.
We are enumerating services based on the generated seq value.
In fact it should be elementary stream PID, but currently
we can leave it until PMT code rework.

The CA_SET_PID and CA_SET_DESCR from OSCam was always set with
seq=0 leading to setting all keys always to first subscribed
service.
Merge remote-tracking branch 'origin/pr/308'