Merge pull request #4164 from mbogosian/master

fixes #4163 (lockunspent help docs are (partially) wrong)

src/rpcwallet.cpp

@@ -1747,7 +1747,7 @@ Value lockunspent(const Array& params, bool fHelp)
         throw runtime_error(
             "lockunspent unlock [{\"txid\":\"txid\",\"vout\":n},...]\n"
             "\nUpdates list of temporarily unspendable outputs.\n"
-            "Temporarily lock (lock=true) or unlock (lock=false) specified transaction outputs.\n"
+            "Temporarily lock (unlock=false) or unlock (unlock=true) specified transaction outputs.\n"
             "A locked transaction output will not be chosen by automatic coin selection, when spending bitcoins.\n"
             "Locks are stored in memory only. Nodes start with zero locked outputs, and the locked output list\n"
             "is always cleared (by virtue of process exit) when a node stops or fails.\n"