squid 3.5.27: Patch for SA 2018:2

squid 3.5.27: Patch for SA 2018:2

As announced, here is the second patch for 'squid 3.5.27'.

For details about this and the previous patch (2018_1) regarding "ESI Response
processing" and "HTTP message processing", see:

http://squid-web-proxy-cache.1019090.n4.nabble.com/squid-announce-ADVISORY-SQUID-2018-1-Denial-of-Service-issue-in-ESI-Response-processing-tp4684618.html

http://squid-web-proxy-cache.1019090.n4.nabble.com/squid-announce-ADVISORY-SQUID-2018-2-Denial-of-Service-issue-in-HTTP-Message-processing-td4684617.html

Signed-off-by: Matthias Fischer <matthias.fischer@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>