CLSA-2026-1784729238 squid: Fix of 3 CVEs

CVE-2026-47729: fix out-of-bounds read in the FTP directory listing parser ftpListParseParts by stopping the whitespace skip at the end of the input buffer - CVE-2026-50012: fix heap buffer overflow in peerDigestSwapInMask by rejecting cache digest replies whose mask data exceeds the declared...