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=<password> ", "Bitcoin", wxOK | wxICON_EXCLAMATION);
#else
fprintf(stdout, "Warning: rpc password is blank, use -rpcpw=<password> ");
#endif