This reverts commit 25d8428c and adds
normal enabled/disable indicators.  POST is all weird today, but so
far this looks good.

(mvc) csrf protection, not very likely to hit in normal situations, but when using legacy free applications, there might not be a csrf token leading to a denial of all requests.

(filter) force kill of filterdns, filterdns doesn't always listen properly to TERM, causing endless waits

(proxy) add a notice to inform the user about the need to download the list. closes https://github.com/opnsense/core/issues/1432

Add ruleset-optimization option in firewall settings. 

Further clean-up of generated firewall rules.

Remove filter_generate_network_aliases since it is not used anywhere and redundant with internal (<if>)/(<if>:network) directives

This sort of reverts commit 5f319ade.

align max username length, ref https://github.com/opnsense/src/blob/4036f873755a3ceeb73c9292065c3530ebfd08e0/sys/sys/param.h#L103

Fix a203c699 to prevent matching interfaces with 'ip' in the end of the end. Thanks to @fichtner and @fabianfrz for helping with regex (#1430)