Add runit config files

Closes #657

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

support/runit/user/root_sv/mobilizon/log/run

@@ -0,0 +1,3 @@
+#!/bin/sh
+mkdir -p  /var/log/mobilizon/
+exec chpst -u mobilizon svlogd -tt /var/log/mobilizon/

support/runit/user/root_sv/mobilizon/run

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+export USER="mobilizon"
+export HOME="/home/$USER"
+
+groups="$(id -Gn "$USER" | tr ' ' ':')"
+svdir="$HOME/service"
+
+exec chpst -u "$USER:$groups" runsvdir "$svdir"