New years cleanup release. Fixes some issues reported and does a cleaning sweep to bring down warnings. Thanks to @ehdgks0627 doing some code review/testing we've uncovered the following (medium) vulnerabilities:

• CVE-2026-22851
• CVE-2026-22852
• CVE-2026-22853
• CVE-2026-22854
• CVE-2026-22855
• CVE-2026-22856
• CVE-2026-22857
• CVE-2026-22858
• CVE-2026-22859

These affect FreeRDP based clients only, with the exception of CVE-2026-22858 also affecting FreeRDP proxy. FreeRDP based servers are not affected.

What's Changed

• [ci,abi] use abigail-tools from repo (#12079)
• [ci,abi] fix missing ABI suppressions (#12080)
• [ci,abi] add missing functions to suppression list (#12081)
• [core,gateway] fix http response (#12095)
• [ci,mac] build openh264 from master branch (#12104)
• [client,sdl] lock primary while used (#12103)
• [client,sdl] show file selection dialog (#12083)
• Proxy fixes (#12106)
• [core,freerdp] fix race in freerdp_abort_connect_context (#12107)