PR: https://forum.opnsense.org/index.php?topic=3311.0

Style cleanup (ran make stylefix)

(firewall, alias) move field split to proper location, for https://github.com/opnsense/core/issues/1109

Suggested by: @fabianfrz

Suggested by: @andreas-p
Inspired by:  pfSense

(model) CertificateField missing cert type in cache, closes https://github.com/opnsense/core/issues/1095

(auth) extend system_authservers.php for pluggable auth connectors, remove totp properties (moved to connector)

(auth) add type/description connector methods and small, for https://github.com/opnsense/core/issues/1085

(auth) extend AuthenticationFactory to support pluggable connectors, for https://github.com/opnsense/core/issues/1085

allow to use CRLs with CertificateField