o Don't look for templates in manufacturer directory
o Allow to use "/" component separator, it's safe
o Hook up the "template list" command

We fall back to the local authentication if not found.

PR: https://github.com/opnsense/plugins/issues/43

* system_console_configure() is really system_login_configure()+
* make a template for sudoers config setting
* move auth template generation to single spot

(pam) switch to pam, with the option to disable our pam helper and switch back to unix mode... for https://github.com/opnsense/core/issues/998

... and it may be that it never will...

(mvc) improve api errors for configuration issues (wrong/missing type) and remove unused return value

We have manifests for packages, no need to duplicate info
about sub-packages that aren't really packages.

Approved by: @adschellevis

PR: https://forum.opnsense.org/index.php?topic=3824

(hassync) trigger xmlrpc sync before service action, for https://github.com/opnsense/core/issues/1217

(mvc, migrations) remove the need for empty boilerplates by using BaseModelMigration when no custom migration is available for the current version.

(ipsec) remove ipsec_force_reload, replace with ipsec_configured_on_interface() to check if a tunnel is configured before reloading ipsec

(ipsec) remove failoverforcereload, when enabled it just calls ipsec_configure() twice, which doesn't look usefull

(mvc) some style fixes in ApiMutableModelControllerBase.php from https://github.com/opnsense/core/pull/1134

(ui) add modal form in legacy template to signal the user about pending service action (stop,start,restart)