Log Message:
www/squid5: update to 5.9

5.9 (2023-05-17)

This release is a bug fix release resolving some issues
found in the prior Squid releases.

The major changes to be aware of:

* Improve reply_body_max_size matching accuracy

This bug shows up as cache.log entries at debug level >=3
stating "HttpReply.cc(..) receivedBodyTooLarge: (negative number) >? -1"

In such cases, reply_body_max_size configuration would be
ignored, resulting in undercounting of traffic.

* Fix build issues highlighted by the most recent versions of
  GCC and Clang.

* Portability fixes for ESI, bundled GnuRegex, and GnuTLS