Added missing info to the README file.

README

@@ -189,9 +189,10 @@ Prepare working directory.
 
 $ mkdir -p /tmp/knot-minimal/samples; cp samples/example.com.zone /tmp/knot-minimal/samples/
 
-Third, let's start the server. This can be done by running the 'knotd' command. Your distribution
-should have a 
-Lets start our server in foreground to see if it runs.
+Third, let's start the server. This can be done by running the 'knotd' command. Alternatively, 
+your distribution should have an init script available, if you've installed Knot using a binary package.
+
+Lets start our server in foreground to see if it runs:
 
 $ knotd myserver.conf # start server