Provide the minimal applications and plugins for: cgi, filelog, syslog and
python3. More plugins can be added if needed by other packages. Autostart
uwsgi in emperor mode loading vassals on demand.

For now, include luci-support (maybe it will be moved to another package),
which uses the syslog plugin by default.

Signed-off-by: Peter Stadler <peter.stadler@student.uibk.ac.at>

execinfo.h is missing.

Signed-off-by: Rosen Penev <rosenp@gmail.com>