dvbapi: 1702/1833 Betacrypt EMM tunnel.

For SC CAID: 1702 (Sky DE, S02).

This commit allows a DVBApi Client to send/process EMMs if the SC runs
in irdeto/beta mode, only reader-caid 1702 is present and no EMMPid
with CAID 1702 ist available but instead EMMPid with CAID 1833 is present.

This is the case on all Sky DE HD channels.

1. A EMMPid with CAID 1833 is added
2. A custom EMMFilter is created and added to the list
3. The EMM headers are adjusted

Patch posted by canna in ticket #3255.

git-svn-id: http://streamboard.de.vu/svn/oscam/trunk@8562 4b0bc96b-bc66-0410-9d44-ebda105a78c1