Codechange: [Network] Remove overload on NetworkValidateClientName

Rename the zero-parameter NetworkValidateClientName to NetworkValidateOurClientName to make it clearer it is performed on our client name, and to make it a non-overloaded function to aid with the variant being added a few commits later

src/network/network.cpp

@@ -795,7 +795,7 @@ bool NetworkClientConnectGame(const std::string &connection_string, CompanyID de
 	std::string resolved_connection_string = ParseGameConnectionString(connection_string, NETWORK_DEFAULT_PORT, &join_as).GetAddressAsString(false);
 
 	if (!_network_available) return false;
-	if (!NetworkValidateClientName()) return false;
+	if (!NetworkValidateOurClientName()) return false;
 
 	_network_join.connection_string = resolved_connection_string;
 	_network_join.company = join_as;

src/network/network_client.cpp

@@ -1338,7 +1338,7 @@ bool NetworkValidateClientName(std::string &client_name)
  * See \c NetworkValidateClientName(char*) for details about the functionality.
  * @return True iff the client name is valid.
  */
-bool NetworkValidateClientName()
+bool NetworkValidateOurClientName()
 {
 	return NetworkValidateClientName(_settings_client.network.client_name);
 }

src/network/network_func.h

@@ -36,7 +36,7 @@ extern StringList _network_ban_list;
 
 byte NetworkSpectatorCount();
 bool NetworkIsValidClientName(const std::string_view client_name);
-bool NetworkValidateClientName();
+bool NetworkValidateOurClientName();
 bool NetworkValidateClientName(std::string &client_name);
 bool NetworkValidateServerName(std::string &server_name);
 void NetworkUpdateClientName(const std::string &client_name);

src/network/network_gui.cpp

@@ -1263,7 +1263,7 @@ static WindowDesc _network_start_server_window_desc(
 
 static void ShowNetworkStartServerWindow()
 {
-	if (!NetworkValidateClientName()) return;
+	if (!NetworkValidateOurClientName()) return;
 
 	CloseWindowById(WC_NETWORK_WINDOW, WN_NETWORK_WINDOW_GAME);
 	CloseWindowById(WC_NETWORK_WINDOW, WN_NETWORK_WINDOW_LOBBY);
@@ -1557,7 +1557,7 @@ static WindowDesc _network_lobby_window_desc(
  */
 static void ShowNetworkLobbyWindow(NetworkGameList *ngl)
 {
-	if (!NetworkValidateClientName()) return;
+	if (!NetworkValidateOurClientName()) return;
 
 	CloseWindowById(WC_NETWORK_WINDOW, WN_NETWORK_WINDOW_START);
 	CloseWindowById(WC_NETWORK_WINDOW, WN_NETWORK_WINDOW_GAME);