Replace evoznode command with masternode and alias znode/evoznode commands to it

[justanwar]

During the introduction of deterministic masternodes RPC commands evoznode/evoznsync was introduced, running side-by-side with znode/znsync for legacy masternodes.

At the time of its introduction the possibility of a rebrand is still far. Had it been known at the time, evoznode command would be masternode instead.

I propose (1) renaming evoznode to masternode (2) aliasing both znode and evoznode to masternode along with the equivalent for mnsync, (3) removing znode/znsync and evoznode/evoznsync aliases after one year.

Simply deprecating these can be disruptive as many sites/third party providers has already adapted their code to evoznode when it was introduced. A one year period will give plenty of time to adapt.

EDIT: we also need to consider for znode znodeblsprivkey et al in firo.conf

[NorseGaud]

I fully support this!