Introduce separate 'generate' RPC call

src/miner.h

@@ -24,6 +24,8 @@ struct CBlockTemplate
 
 /** Run the miner threads */
 void GenerateBitcoins(bool fGenerate, CWallet* pwallet, int nThreads);
+/** Create a single block */
+bool MineBlock(CWallet *pwallet, uint256& hash);
 /** Generate a new block, without valid proof-of-work */
 CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn);
 CBlockTemplate* CreateNewBlockWithKey(CReserveKey& reservekey);