security/strongswan: Update 6.0.4 => 6.0.5 (CVE-2026-25075)

Changelog:
https://github.com/strongswan/strongswan/releases/tag/6.0.5

While here:

• Switch from post-install + "if PORT_OPTIONS:MVICI" to post-install-VICI-on.
• Add option FIPS_PRF - software implementation plugin.
• Improve plist.
• Refresh patches.

Reported by: Mike Bressem <mike@bressem.com> (via email)
Approved by: blanket (fix CVE)
Security: CVE-2026-25075
Sponsored by: UNIS Labs
MFH: 2026Q2

(cherry picked from commit 2d6221ae7df33419e639c439a12c78fdea84e748)