Network: Allow hotplug for network adapters

This allows to insert (e.g.) a WiFi stick while E2 is running. The
adapter will then be visible in the network menu.
Activating the network still needs to be done manually though.
Future enhancement would be to re-configure and enable it when it
has already been configured (e.g. call activateInterface).
InfoBar: Declare pip.servivePath when opening PIP from Movieplayer

This avoids a GSOD when exit movieplayer with stop and then swap the PIP
Thanks Dima73 for reporting
Add parameter to playService not to adjust on servicelist
Correctly keep bouquets with pipzap and toggle pip
Merge branch 'master' of git://git.code.sf.net/p/openpli/enigma2