Re: JSON-RPC password

TODO: dialog box or debug.log warning if no rpc.user/rpc.password is set, explaining how to set.

In many of the contexts of this RPC stuff, you can print to the console with fprintf(stdout, like this: #if defined(WXMSW) && wxUSE_GUI         MyMessageBox(“Warning: rpc password is blank, use -rpcpw= ”, “Bitcoin”, wxOK | wxICON_EXCLAMATION); #else         fprintf(stdout, “Warning: rpc password is blank, use -rpcpw= ”); #endif