Move `CommandAPI` into base API

sources/BaseAPI/API/Commands/Commands_Feature.uc

@@ -73,7 +73,7 @@ var private /*config*/ bool useMutateInput;
 // Default is "!". Empty values are also treated as "!".
 var private /*config*/ Text chatCommandPrefix;
 
-var LoggerAPI.Definition errCommandDuplicate;
+var LoggerAPI.Definition errCommandDuplicate, errServerAPIUnavailable;
 
 protected function OnEnabled() {
     registeredCommands = _.collections.EmptyHashTable();
@@ -95,10 +95,11 @@ protected function OnEnabled() {
         _.chat.OnMessage(self).Disconnect();
     }
     if (useMutateInput || emergencyEnabledMutate) {
-        _server.unreal.mutator.OnMutate(self).connect = HandleMutate;
-    }
-    else {
-        _server.unreal.mutator.OnMutate(self).Disconnect();
+        if (__server() != none) {
+            __server().unreal.mutator.OnMutate(self).connect = HandleMutate;
+        } else {
+            _.logger.Auto(errServerAPIUnavailable);
+        }
     }
 }
 
@@ -106,8 +107,8 @@ protected function OnDisabled() {
     if (useChatInput) {
         _.chat.OnMessage(self).Disconnect();
     }
-    if (useMutateInput) {
-        _server.unreal.mutator.OnMutate(self).Disconnect();
+    if (useMutateInput && __server() != none) {
+        __server().unreal.mutator.OnMutate(self).Disconnect();
     }
     useChatInput = false;
     useMutateInput = false;
@@ -244,7 +245,11 @@ public final static function EmergencyEnable() {
     if (noWayToInputCommands) {
         default.emergencyEnabledMutate = true;
         feature.emergencyEnabledMutate = true;
-        __server().unreal.mutator.OnMutate(feature).connect = HandleMutate;
+        if (__server() != none) {
+            __server().unreal.mutator.OnMutate(feature).connect = HandleMutate;
+        } else {
+            __().logger.Auto(default.errServerAPIUnavailable);
+        }
     }
 }
 
@@ -503,4 +508,5 @@ public final function bool HandleInputWith(Parser parser, EPlayer callerPlayer)
 defaultproperties {
     configClass = class'Commands'
     errCommandDuplicate = (l=LOG_Error,m="Command `%1` is already registered with name '%2'. Command `%3` with the same name will be ignored.")
+    errServerAPIUnavailable = (l=LOG_Error,m="Server API is currently unavailable. Input methods through chat and mutate command will not be available.")
 }