scripted-diff: Replace CCriticalSection with RecursiveMutex

-BEGIN VERIFY SCRIPT-
 # Delete outdated alias for RecursiveMutex
 sed -i -e '/CCriticalSection/d'                 ./src/sync.h
 # Replace use of outdated alias with RecursiveMutex
 sed -i -e 's/CCriticalSection/RecursiveMutex/g' $(git grep -l CCriticalSection)
-END VERIFY SCRIPT-

src/validation.h

@@ -136,7 +136,7 @@ struct BlockHasher
     size_t operator()(const uint256& hash) const { return ReadLE64(hash.begin()); }
 };
 
-extern CCriticalSection cs_main;
+extern RecursiveMutex cs_main;
 extern CBlockPolicyEstimator feeEstimator;
 extern CTxMemPool mempool;
 typedef std::unordered_map<uint256, CBlockIndex*, BlockHasher> BlockMap;
@@ -560,7 +560,7 @@ private:
      * Every received block is assigned a unique and increasing identifier, so we
      * know which one to give priority in case of a fork.
      */
-    CCriticalSection cs_nBlockSequenceId;
+    RecursiveMutex cs_nBlockSequenceId;
     /** Blocks loaded from disk are assigned id 0, so start the counter at 1. */
     int32_t nBlockSequenceId = 1;
     /** Decreasing counter (used by subsequent preciousblock calls). */
@@ -572,7 +572,7 @@ private:
      * the ChainState CriticalSection
      * A lock that must be held when modifying this ChainState - held in ActivateBestChain()
      */
-    CCriticalSection m_cs_chainstate;
+    RecursiveMutex m_cs_chainstate;
 
     /**
      * Whether this chainstate is undergoing initial block download.