Add authlib profile url setting

src/main/java/net/citizensnpcs/Settings.java

@@ -57,6 +57,7 @@ public class Settings {
     }
 
     public enum Setting {
+        AUTH_SERVER_URL("general.authlib.profile-url", "https://sessionserver.mojang.com/session/minecraft/profile/"),
         CHAT_BYSTANDERS_HEAR_TARGETED_CHAT("npc.chat.options.bystanders-hear-targeted-chat", true),
         CHAT_FORMAT("npc.chat.format.no-targets", "[<npc>]: <text>"),
         CHAT_FORMAT_TO_BYSTANDERS("npc.chat.format.with-target-to-bystanders", "[<npc>] -> [<target>]: <text>"),

src/main/java/net/citizensnpcs/nms/v1_10_R1/util/NMSImpl.java

@@ -257,8 +257,8 @@ public class NMSImpl implements NMSBridge {
         YggdrasilAuthenticationService auth = ((YggdrasilMinecraftSessionService) sessionService)
                 .getAuthenticationService();
 
-        URL url = HttpAuthenticationService.constantURL("https://sessionserver.mojang.com/session/minecraft/profile/"
-                + UUIDTypeAdapter.fromUUID(profile.getId()));
+        URL url = HttpAuthenticationService
+                .constantURL(Setting.AUTH_SERVER_URL.asString() + UUIDTypeAdapter.fromUUID(profile.getId()));
 
         url = HttpAuthenticationService.concatenateURL(url, "unsigned=" + !requireSecure);