Declare support for multimon in proxy server.
It was broken in the DISP PR.
@@ -245,6 +245,7 @@ static DWORD WINAPI pf_server_handle_client(LPVOID arg)
/* keep configuration in proxyData */
pdata->config = client->ContextExtra;
config = pdata->config;
+ client->settings->UseMultimon = TRUE;
client->settings->SupportGraphicsPipeline = config->GFX;
client->settings->SupportDynamicChannels = TRUE;
client->settings->CertificateFile = _strdup("server.crt");
