Several squid-related PRs to commit

[Pavel Timofeev]

Hi,

Could anybody take a look at these PRs and commit them if possible?

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=246355 - www/squid-devel:
add patch to fix kerberos_ldap_group helper
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=246410 - www/squid:
pinger doesn't start after r533790 change
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=245861 - www/squid: 4.11
fails to build: error: no member named 'keyblock' in 'krb5_creds'

Didn't want to bother anyone, but squid port is quite popular, so I just
wanted to provide better freebsd use experience