(usage): Added the "-f" option to the usage message.

src/server/splitkomdb.c

@@ -96,7 +96,7 @@ safe_remove(const char *filename)
 static void
 usage(const char *arg0)
 {
-    fprintf(stderr, "usage: %s [-c config-file] [ -v ] [ -V ]\n",
+    fprintf(stderr, "usage: %s [-c config-file] [ -f ] [ -v ] [ -V ]\n",
 	    arg0);
     exit(1);
 }