doc: some helpful pointers

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

doc/config.md

@@ -182,6 +182,8 @@ optional arguments and description.
 `run` commands are guaranteed to be completed before running the next
 command.  Highly useful if true serialization is needed.
 
+> `<COND>` is described in the [Services](#services) section.
+
 
 ### One-shot Commands (parallel)
 
@@ -194,6 +196,8 @@ redirects can be freely used:
 
     task [s] echo "foo" | cat >/tmp/bar
 
+> `<COND>` is described in the [Services](#services) section.
+
 
 ### SysV Init Scripts
 
@@ -212,6 +216,8 @@ calls `init-script restart` on `initctl reload`.  Similar to how
 Forking services started with `sysv` scripts can be monitored by Finit
 by declaring the PID file to look for: `pid:!/path/to/pidfile.pid`.
 
+> `<COND>` is described in the [Services](#services) section.
+
 
 ### Services