This fixes a regression from 543d971ed2 whereby
match-lambda due to configuration field reordering.
* gnu/services/security.scm:
[serialize-fail2ban-ignore-cache-configuration]: Switch to match-record.
[serialize-fail2ban-jail-filter-configuration]: Switch to match-record.
[serialize-fail2ban-jail-action-configuration]: Switch to match-record.
Signed-off-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>