dreambox-secondstage: keep using mtd-utils on dm8000

dm8000 nand driver writes invalid OOB data, with
the busybox nandwrite applet.
So keep using mtd-utils for the dm8000.
Oscam cleanup, phase 1: remove all stable/unstable/experimental[cs] versions.
Oscam cleanup, phase 2: remove list-smargo util.

It's a bit tricky to maintain in the current setup, and actually
it doesn't seem to add much to lsusb.
Oscam cleanup, phase 3: add single more or less current oscam version.

Also:
 - use standard startup scripts from softcam helper package
 - this reduces redundancy greatly
 - remove all config files that are not necessary for local card watching
 - cleanup other config files, alike
 - remove other non-necessary options from the config files
 - add rconflicts/rreplaces to remove already installed oscam packages
 - tested with CDS/NL nagravision 3 card
softcam.inc: use do_compile_append instead of do_compile

The oscam package needs this because it both needs the
softcam.inc "compile" code and it needs to compile code
itself using cmake.
softcam.inc: cleanup

- removed $D in pre-scripts, it shouldn't be there?
- used quotes more consistently, this prevents some
possible (harmless) error messages from ash.
enigma2: RRECOMMEND glib-networking

required to play tls/ssl streams with gstreamer
Merge remote-tracking branch 'openpli3/master' into HEAD

Conflicts:
	meta-openpli/recipes-openpli/enigma2/enigma2.bb