Add ability to disable custom communities

Author: SollyBunny

src/engine/shared/config_variables_tclient.h

@@ -261,4 +261,4 @@ MACRO_CONFIG_STR(TcExecuteOnJoin, tc_execute_on_join, 100, "Run a console comman
 MACRO_CONFIG_INT(TcExecuteOnJoinDelay, tc_execute_on_join_delay, 2, 7, 50000, CFGFLAG_CLIENT | CFGFLAG_SAVE, "Tick delay before executing tc_execute_on_join")
 
 // Custom Communities
-MACRO_CONFIG_STR(TcCustomCommunitiesUrl, tc_custom_communities_url, 256, "https://raw.githubusercontent.com/SollyBunny/ddnet-custom-communities/refs/heads/main/custom-communities-ddnet-info.json", CFGFLAG_CLIENT | CFGFLAG_SAVE, "URL to fetch custom communities from (must be https)")
+MACRO_CONFIG_STR(TcCustomCommunitiesUrl, tc_custom_communities_url, 256, "https://raw.githubusercontent.com/SollyBunny/ddnet-custom-communities/refs/heads/main/custom-communities-ddnet-info.json", CFGFLAG_CLIENT | CFGFLAG_SAVE, "URL to fetch custom communities from (must be https), empty to disable")

src/game/client/components/tclient/custom_communities.cpp

@@ -46,7 +46,7 @@ void CCustomCommunities::LoadCustomCommunitiesDDNetInfo()
 
 void CCustomCommunities::CustomCommunitiesFunction(std::vector<json_value *> &vCommunities)
 {
-	if(m_pCustomCommunitiesDDNetInfo)
+	if(m_pCustomCommunitiesDDNetInfo && g_Config.m_TcCustomCommunitiesUrl[0] != '\0')
 	{
 		const json_value &Communities = (*m_pCustomCommunitiesDDNetInfo)["communities"];
 		if(Communities.type == json_array)
@@ -61,6 +61,8 @@ void CCustomCommunities::CustomCommunitiesFunction(std::vector<json_value *> &vC
 
 void CCustomCommunities::OnInit()
 {
+	if(g_Config.m_TcCustomCommunitiesUrl[0] == 0)
+		return;
 	m_pCustomCommunitiesDDNetInfoTask = HttpGetFile(g_Config.m_TcCustomCommunitiesUrl, Storage(), CUSTOM_COMMUNITIES_DDNET_INFO_FILE, IStorage::TYPE_SAVE);
 	m_pCustomCommunitiesDDNetInfoTask->Timeout(CTimeout{10000, 0, 500, 10});
 	m_pCustomCommunitiesDDNetInfoTask->SkipByFileTime(false); // Always re-download.