doc: massive refactor and simplification to migrate to mkdocs

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

doc/config/templating.md

@@ -0,0 +1,39 @@
+Templating
+==========
+
+Finit comes with rudimentary support for templating, similar to that of
+systemd.  Best illustrated with an example:
+
+    $ initctl show avahi-autoipd@
+    service :%i avahi-autoipd --syslog %i -- ZeroConf for %i
+
+To enable ZeroConf for, e.g., `eth0`, use
+
+    $ initctl enable avahi-autoipd@eth0.conf
+
+The enabled symlink will be set up to `avahi-autoipd@.conf` and every
+instance of `%i` will in the instantiated directive be replaced with
+`eth0`.  Inspect the resulting instantiated template with `initctl show
+avahi-autoipd:eth0` and check the status of a running instance with:
+
+```
+$ initctl status avahi-autoipd:eth0
+     Status : running
+   Identity : avahi-autoipd:eth0
+Description : ZeroConf for eth0
+     Origin : /etc/finit.d/enabled/avahi-autoipd@eth0.conf
+Environment : -/etc/default/avahi-autoipd-eth0
+    Command : avahi-autoipd $AVAHI_AUTOIPD_ARGS eth0
+   PID file : /run/avahi-autoipd.eth0.pid
+        PID : 4190
+       User : root
+      Group : root
+     Uptime : 24 sec
+   Restarts : 0 (0/10)
+  Runlevels : [---2345-789]
+     Memory : 20.0k
+     CGroup : /system/avahi-autoipd@eth0 cpu 0 [100, max] mem [0, max]
+              └─ 4190 avahi-autoipd: [eth0] bound 169.254.1.9  
+
+Jul  8 11:51:42 infix-c0-ff-ee finit[1]: Starting avahi-autoipd:eth0[4190]
+```