[Server] Configuration Issues Checker (LAN Detection) (#2283)

* LAN detect

* Add more checks, consolidate logic

* Tweaks

* Tweaks

* Update world_config.cpp

* Tweak logic

* Add DNS resolution

* Delete task runner after being used

* JSON path notation adjust

world/main.cpp

@@ -104,6 +104,7 @@ union semun {
 #include "world_store.h"
 #include "world_event_scheduler.h"
 #include "shared_task_manager.h"
+#include "../common/ip_util.h"
 
 WorldStore          world_store;
 ClientList          client_list;
@@ -634,6 +635,8 @@ int main(int argc, char **argv)
 		}
 	);
 
+	WorldConfig::CheckForPossibleConfigurationIssues();
+
 	EQStreamManagerInterfaceOptions opts(9000, false, false);
 	opts.daybreak_options.resend_delay_ms     = RuleI(Network, ResendDelayBaseMS);
 	opts.daybreak_options.resend_delay_factor = RuleR(Network, ResendDelayFactor);