VPN: OpenVPN: Connection Status: migrate to MVC

[fichtner]

Important notices

Before you add a new report, we ask you kindly to acknowledge the following:

• I have read the contributing guide lines at https://github.com/opnsense/core/blob/master/CONTRIBUTING.md
• I am convinced that my issue is new after having checked both open and closed issues at https://github.com/opnsense/core/issues?q=is%3Aissue

Is your feature request related to a problem? Please describe.

Static pages need to be removed eventually. Services page offers opportunity for it and enables API handling of the functionality.

Describe the solution you like

Probably a good idea to start with in order to make room for a new mvc implementation of OpenVPN. The backend part is already finished.

Describe alternatives you considered

N/A

Additional context

N/A

[fichtner]

@AdSchellevis there seems to be a small leftover:

# git grep status_openvpn
src/www/widgets/include/openvpn.inc:$openvpn_title_link = 'status_openvpn.php';
src/www/widgets/widgets/openvpn.widget.php:            $.post('/status_openvpn.php', {action: 'kill', port:port, remipp:ip}, function(data) {

[AdSchellevis]

@fichtner I'll put it on my list of things todo.