Fix Ip::Address::operator =(sockaddr_storage)

The memcpy() for AF_INET6 is using a length of sizeof(sockaddr_in) instead
of sizeof(sockaddr_in6), so squid was trying to connect to truncatured IPv6
addresses with strange ports.
Cleanup: update several CBDATA classes part 2

Removes several cbdataAlloc/cbdataFree by updating classes to use 
CBDATA_CLASS2 macro..
Cleanup: Remove last CBDATA_CLASS() macros

Update the final CBDATA_CLASS() macro usages to CBDATA_CLASS2() and
remove the now defunct macro.
Bug 3842: Segfault during connection close in ConnStateData::stopReceiving()
Bug 3762: remove bogus WARNING in cache.log

The warning is bogus for several reasons:
* it appears with memory-only cache configurations
* it only checks the size of first SwapDir (as seen in bug 3762)
* very large memory spaces are now possible which may make disk appear
  small by comparison.

Its usefulness in detecting memory and disk misconfigurations has long
been almosy nil. Removing this entirey to resolve the bogus noise in
the above mentinoed legitimate configurations.
Prep for 3.3.6
Bug 3297: Fix openSSL related build failures

- The SSL_CTX_new in newer openSSL releases requires a const
'SSL_METHOD *' argument and in older releases requires non const
'SSL_METHD *' argument. Currently we are trying to identify openSSL
version using the OPENSSL_VERSION_NUMBER macro define but we are failing
to correctly identify all cases.

- sk_OPENSSL_PSTRING_value is buggy in early openSSL-1.0.0? releases
causing compile errors to squid.

This is a Measurement Factory project
Fix build on FreeBSD 9.x platform with clang

Add the "/usr/local/*" directories to include files  and libraries  search 
paths, for clang compiler too.
Bootstrapped
Release Notes: initial 3.4 changelog
Cleanup: remove duplicate includes

Remove duplicate includes of system files already pulled in by compat/types.h
Bug 3876: mDNS support segfault when using --disable-ipv6

When IPv6 is disabled the mDNS IPv6 multicast group gets rejected by
idnsAddnameserver() resulting in invalid pointers for the remaining
mDNS NS setup operations.

Convert the hard-coded mDNS nameserver count to dynamic global count and
elide the relevant NS when IPv6 support disabled.
Support IPv6 NAT interception on Linux

NAT support has been included for IPv6 in Linux 3.7 (along with
REDIRECT/DNAT rules), as well as IP6T_SO_ORIGINAL_DST in Linux 3.8.
Add support for transparent proxies over IPv6.

There is a bug in linux/netfilter_ipv6/ip6_tables.h on C++ compilers, 
the bug report and patch to fix it can be found at
  https://lkml.org/lkml/2012/9/30/146.
It is only used for the constant IP6T_SO_ORIGINAL_DST. We attempt to use
the official header whenever possible but if it is detected missing or
broken we define our own version of the option.

IPv6 is now permitted on any http_port or https_port in squid.conf
however on older Linux systems and Unix systems without the required NAT
support Squid will fail when accepting the traffic.

Also, this removes the blocker checks preventing BSD systems using NAT
interception on IPv6 ports. Several version of PF have long since
supported IPv6 NAT operations although it was discouraged, such support
is not easily detected though so results WILL vary by operating system.
Add storeid_file_rewrite helper

Based on work by Eliezer Croitoru <eliezer@ngtech.co.il>

This program acts as a Store-ID helper program, rewriting URLs passed
by Squid into storage-ids that can be used to achieve better caching
for websites that use different URLs for the same content.

It takes a text file with two tab separated columns.
 Column 1: Regular expression to match against the URL
 Column 2: Rewrite rule to generate a Store-ID

Rewrite rules are matched in the same order as they appear in the file.
So for best performance, sort it in order of frequency of occurrence.
Release Notes: more 3.4 documentation
SourceFormat Enforcement
Protect against buffer overrun in DNS query generation

see SQUID-2013:2.

This bug has been present as long as the internal DNS component however
most code reaching this point is passing through URL validation first.
With Squid-3.2 Host header verification using DNS directly we may have
problems.
Prep for 3.2.12 and 3.3.7
Bug 3869: assertion failed: MemBuf.cc:272: size < capacity
Better handling of strange port values in Host:

We can do better than just producing errors about invalid port details
and treatign it as port-0.
We can instead undo the port separation and pass it through as part of
the host name to be verified with the default port number properly
assumed.