ids.cgi: Use experimental smartmatch.

This will prevent from spawning the http error log with warnings.

Signed-off-by: Stefan Schantl <stefan.schantl@ipfire.org>

html/cgi-bin/ids.cgi

@@ -20,6 +20,7 @@
 ###############################################################################
 
 use strict;
+use experimental 'smartmatch';
 
 # enable only the following on debugging purpose
 #use warnings;