add support for EMM requests to SAT>IP VDR

Add support at dvbapi for sat>ip (network mode).

- DVBApi had to be updated to latest stable version 2.1.1. (tarball needs upload to oe server)
- VDR need a patch to sent EMM Requests in Network Mode
- the VDR patch is/would be included at the next vdr version (patch could be dropped at next VDR release)