squid security and bug fix update

7:3.5.20-15 - Resolves: 1690551 - Squid cachepeer DNS lookup failed when not all lower case - Resolves: 1680022 - squid cant display download/upload packet size for HTTPS sites - Resolves: 1717430 - Excessive memory usage when running out of descriptors - Resolves: 1676420 - Cache siblings return...