According to a mailing list post by Matt Corallo plans are in the works to drop transaction priority relay and mining code from the Bitcoin client "Core" in its 0.12 release (archived). "Core" is the Bitcoin Client whose development was formerly supported and directed by the Vessenes' Foundation, in contrast to the bitcoind client 'therealbitcoin' maintained by the Bitcoin Foundation. Earlier this week the developers of the "Core" client released a version 11.2 which introduces soft forking code to implement a time locking feature referred to as "Check Lock Time Verify" and designated BIP 65. This summer a soft forking change designated BIP 66 lead to several chain splits and reorganizations when it was triggered.