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 # Delete outdated alias for RecursiveMutex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 # Replace use of outdated alias with RecursiveMutex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/wallet/db.cpp

@@ -44,7 +44,7 @@ void CheckUniqueFileid(const BerkeleyEnvironment& env, const std::string& filena
     }
 }
 
-CCriticalSection cs_db;
+RecursiveMutex cs_db;
 std::map<std::string, std::weak_ptr<BerkeleyEnvironment>> g_dbenvs GUARDED_BY(cs_db); //!< Map from directory name to db environment.
 } // namespace
 
@@ -650,7 +650,7 @@ void BerkeleyEnvironment::ReloadDbEnv()
 {
     // Make sure that no Db's are in use
     AssertLockNotHeld(cs_db);
-    std::unique_lock<CCriticalSection> lock(cs_db);
+    std::unique_lock<RecursiveMutex> lock(cs_db);
     m_db_in_use.wait(lock, [this](){
         for (auto& count : mapFileUseCount) {
             if (count.second > 0) return false;