Reset the cli buffer when we have soaked up all it contained.

Otherwise we will for ever be repeating the same command over and over,
no matter what the input to the cli might be.


git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@1859 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/mgt_cli.c

@@ -337,7 +337,8 @@ mgt_cli_callback(struct ev *e, int what)
 		assert(q == cp->buf + cp->nbuf);
 		cp->nbuf -= (p - cp->buf);
 		memmove(cp->buf, p, cp->nbuf);
-	}
+	} else
+		cp->nbuf = 0;
 	return (0);
 
 cli_close: