IPENCAP not listed in /usr/local/www/firewall_rules_edit.php etc

[JHK]

I can no longer add IP protocols such as IPENCAP in /usr/local/www/firewall_rules_edit.php due to PHP version changes in pfSense 2.7.
Seems like get_ipprotocls() call for the list of ip protocols such as UDP / TCP / IGMP etc but cannot find how / where to o add new one like IPENCAP.
Anyone knows how to add one? Older PHP was easier to add one because protocols list was written directly in respective php files, but it's not in there anymore.

$section->addInput(new Form_Select(
'proto',
'*Protocol',
$pconfig['proto'],
get_ipprotocols()
))->setHelp('Choose which IP protocol this rule should match.');