CLSA-2026-1774874764 squid: Fix of 3 CVEs

CVE-2026-33526: fix heap use-after-free due to double rfc1738escape in ICP error handling - CVE-2026-33515: fix validation of ICP packet sizes and URLs to prevent out-of-bounds reads - CVE-2026-32748: fix HttpRequest use-after-free in ICP v3 query handling...