Updated squid packages fix security vulnerabilities

Incorrect processing of responses to If-None-Modified HTTP conditional requests leads to client-specific Cookie data being leaked to other clients. Attack requests can easily be crafted by a client to probe a cache for this information (CVE-2016-10002). Incorrect HTTP Request header comparison results in Collapsed Forwarding feature mistakenly identifying some private responses as being suitable for delivery to multiple clients (CVE-2016-10003).