squid: Fix of 3 CVEs

CVE-2019-12521: fix ESI parser off-by-one heap overflow by enforcing a stack-depth limit and throwing on overflow - CVE-2019-12524 already addressed by the CVE-2019-12520 backport same fix upstream; see Squid advisory SQUID-2019:4...

CLSA-2026-1777446517 squid: Fix of 3 CVEs

CVE-2019-12521: fix ESI parser off-by-one heap overflow by enforcing a stack-depth limit and throwing on overflow - CVE-2019-12524 already addressed by the CVE-2019-12520 backport same fix upstream; see Squid advisory SQUID-2019:4...