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)

(mvc) remove incomplete error handling, was superseded https://github.com/opnsense/core/commit/22701ee038722408a8d21916dbb6ee13023a39dd#diff-755c67cb284868a802a88a873c75038c closes https://github.com/opnsense/core/issues/1234

The current issue is you can't actually restart ipsec without disabling and enabling the service, which is odd and confusing.

Convert actions to configd template and change service registration.

Since plugins are now tied to the heartbeat of the system itself,
it makes sense to split out hardcoded base functionality into
their pluggable counterparts.  Start with the candidates that
already have a plugin file.

Discussed with: @adschellevis

fix broken squid configuration

(traffic shaper) add support for address lists, and invert src/dst. closes https://github.com/opnsense/core/issues/1226

(mvc, model) add support for lists of networks/addresses in NetworkField, requirement for https://github.com/opnsense/core/issues/1226

(BaseModel) Always log the class where validation failed

(IDS) extend support for compressed files with "inline::" keyword to be able to download parts of an archive (required to download snort rules).
Change processing order to always stream data to tempfiles first, so we can reuse downloaded files (an archive scan isn't very expensive)

This reverts commit 5e1bb856.

We don't know the ultimate performance penalty of using plugins
for every component, so for now keep core functionality in
services.inc.

(services.inc / services_radvd_configure) more duplication for https://github.com/opnsense/core/issues/1196

(services.inc / services_radvd_configure) fix for https://github.com/opnsense/core/issues/1196 and cleanups

Quite some inconsistencies in this function, parameters that can't be set, lack of logic and code duplication.
* removes get_configured_pppoe_server_interfaces(), which can't work anyway... pppoe server interfaces are registered via the plugin itself.
* $dhcpv6ifconf['mode'] can't be set anywhere....
* don't try to revalidate rainterface
* collect "real interface" from dhcpif, shouldn't use carp if
* remove code duplication in dns collection
* move checks up for interface we should skip (when possible)

(services) add support for "non stoppable" services, configuration options without status. needed for https://github.com/opnsense/core/issues/1217