* add subver to alert output
* update privkey format to sendalert
* remove end_of_pow check in checkblock
 because the function is supposed to be context-free, this fixes a block rejection bug when starting from scratch
 e.g. when the current latest checkpointed block is in the proof-of-stake phase and we're on block 0 (the proof-of-work phase)
* update alert command
fix relock on sending coins when "for staking only" is activated

Sets the checkbox in the askpassphrase dialog to the previous value of
fWalletUnlockStakingOnly resolving the issue that the wallet gets locked
after sending coins when "for staking only" is activated.