pfSense

Set picture widget download file ext. Fixes #15767

Refine widget validation checks. Fixes #15844

Config access regression when saving dnsmasq overrides. Fix #15890

Dashboard widget settings and widgetkey validation. Issue #15844

• Adds validation of submitted widgetkey values before use when storing widget settings and other similar operations.
• Adds validation of widget settings which were not already validated.

Validate inputs when killing OpenVPN clients. Fixes #15856

While here, fix the JS 'busy' icon switching for both the widget and status page.

Ignore queue status interface. Fix #15885

Return the previous condition; $altqstats['interface'] is not required.

Don't separate the last array key in config access paths

Config access regression in L2TP. Fix #15882

Limit RDNSS addresses to 3. Fix #15876

Merge pull request #4717 from Self-Hosting-Group/igd-pcp-finalisation

https://redmine.pfsense.org/issues/15864

Followup to:
7961830d30b89605b26732350335f5a9498ff5ba
9bc580f00f691b2c3de5f029c8f381205eb99e07