comment out unused private fields (and their classes)

This was likely added in preparation of further development which
stalled and is now clogging up the compiler warnings.

Silences warnings on master-freebsd10-64bit.
extend IPTV recorder to handle MTPS input

By parsing VLC style program_number from the playlist the recorder
can select a specific program from the stream. The program_number
is also known as the service_id in DVB vocabulary.

Example playlist:

    #EXTM3U
    #EXTINF:0,1 - name of the program
    #EXTVLCOPT:program=61200
    http://192.168.1.100:8001/1:0:19:EF10:421:1:C00000:0:0:0:

Original patch by Torbjörn Jansson
Refs #11487