Merge bitcoin#10883: Rename -usewallet to -rpcwallet

2264236 Rename -usewallet to -rpcwallet (Alex Morcos)

Pull request description:

Tree-SHA512: 99bdbff5d18e464e620b7b2a1ff8db874b3888db4d43348c96c372097ed51edd796b564e4ef1193ccd75d0a1fd51f865cf6fff4e0e3672654cd2933c851d210a

src/dash-cli.cpp

@@ -48,7 +48,7 @@ std::string HelpMessageCli()
     strUsage += HelpMessageOpt("-rpcpassword=<pw>", _("Password for JSON-RPC connections"));
     strUsage += HelpMessageOpt("-rpcclienttimeout=<n>", strprintf(_("Timeout in seconds during HTTP requests, or 0 for no timeout. (default: %d)"), DEFAULT_HTTP_CLIENT_TIMEOUT));
     strUsage += HelpMessageOpt("-stdin", _("Read extra arguments from standard input, one per line until EOF/Ctrl-D (recommended for sensitive information such as passphrases)"));
-    strUsage += HelpMessageOpt("-usewallet=<walletname>", _("Send RPC for non-default wallet on RPC server (argument is wallet filename in bitcoind directory, required if bitcoind/-Qt runs with multiple wallets)"));
+    strUsage += HelpMessageOpt("-rpcwallet=<walletname>", _("Send RPC for non-default wallet on RPC server (argument is wallet filename in bitcoind directory, required if bitcoind/-Qt runs with multiple wallets)"));
 
     return strUsage;
 }
@@ -257,7 +257,7 @@ UniValue CallRPC(const std::string& strMethod, const UniValue& params)
 
     // check if we should use a special wallet endpoint
     std::string endpoint = "/";
-    std::string walletName = gArgs.GetArg("-usewallet", "");
+    std::string walletName = gArgs.GetArg("-rpcwallet", "");
     if (!walletName.empty()) {
         char *encodedURI = evhttp_uriencode(walletName.c_str(), walletName.size(), false);
         if (encodedURI) {