what do these values in chainparams.cpp do?
what do these values in chainparams.cpp do?


If nMajorityEnforceBlockUpgrade out of the last nMajorityWindow blocks have signaled support for a softfork, enforce the softfork's rules on the blocks that have signaled support. 

If nMajorityRejectBlockOutdated out of the last nMajorityWindow blocks have signaled support for a softfork, mark blocks with an old version as invalid.

These are for BIP34 style softforks.