uwsgi: add modular package superseeding uwsgi-cgi

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>

net/uwsgi/files/emperor.ini

@@ -0,0 +1,9 @@
+[uwsgi]
+strict = true
+pidfile = /var/run/uwsgi.pid
+emperor = /etc/uwsgi/vassals/*.ini
+early-emperor = true
+vacuum = true
+emperor-on-demand-directory = /var/run/
+emperor-required-heartbeat = 99
+vassal-set = die-on-idle=true