[VOTE][RFC] 64 bit format codes for pack() and unpack()

Voting is now open for this RFC. Voting closes around this time on the
3rd of October 2014.

https://wiki.php.net/rfc/pack_unpack_64bit_formats

Thanks,

Leigh.

Voting is now closed. RFC accepted with 100% in favour.

Pull request for the implementation: https://github.com/php/php-src/pull/812

Thanks all.

Leigh.