ids.cgi: Always write config files for enabled/disabled rule files

ids.cgi: Always write config files for enabled/disabled rule files

If a single sid has been activated and then disabled without doing
any other ruleset modifications only one of the oinkmaster files
for enabled / disabled rules has been modified.

In this case it was possible, that the same sid, was part of the
file for enabled rules and part of the file for disabled rules at the
same time.

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