frontends (tools/webrtc): add a options to merge video for PiP and to specify size: - the `merge_pip` option is now used to indicate if local feedback and remote video streams must be merged with local feedback being a PiP of remote video. By default, it's done for `SINKS_AUTO`, but it can be manually specified to use it with `SINKS_APP` or to split ``SINKS_AUTO`` in 2 windows. - target size of the compositor used with `merge_pip` can be specified. By default, 720p is used. rel 428

#!/bin/sh

eval $(dbus-launch --sh-syntax)

# default, backend is launched in foreground
if [ $# -eq 0 ]
then
	exec libervia-backend fg
fi

# backend is launched with an explicit subcommand
if [ $1 = fg -o $1 = bg -o $1 = debug -o $1 = stop -o $1 = status ]
then
	exec libervia-backend "$@"
fi

# a whole command is specified
libervia-backend bg
exec "$@"