Allow MineBlocksOnDemand on mocknet (#1638)

* Allow setmocktime on mocknet

* Revert "Allow setmocktime on mocknet"

This reverts commit cc8302e.

* MineBlocksOnDemand on mocknet

src/chainparams.h

@@ -80,7 +80,7 @@ class CChainParams
     /** Minimum free space (in GB) needed for data directory when pruned; Does not include prune target*/
     uint64_t AssumedChainStateSize() const { return m_assumed_chain_state_size; }
     /** Whether it is possible to mine blocks on demand (no retargeting) */
-    bool MineBlocksOnDemand() const { return consensus.pos.fNoRetargeting; }
+    bool MineBlocksOnDemand() const { return consensus.pos.fNoRetargeting || fMockNetwork; }
     /** Return the BIP70 network string (main, test or regtest) */
     std::string NetworkIDString() const { return strNetworkID; }
     /** Return the list of hostnames to look up for DNS seeds */