Separate option to cancel afk on chat from interact

Essentials/src/main/java/com/earth2me/essentials/EssentialsPlayerListener.java

@@ -162,7 +162,7 @@ public void onPlayerChat(final AsyncPlayerChatEvent event) {
             }
         }
 
-        user.updateActivityOnInteract(true);
+        user.updateActivityOnChat(true);
         user.setDisplayNick();
     }
 

Essentials/src/main/java/com/earth2me/essentials/ISettings.java

@@ -199,6 +199,8 @@ public interface ISettings extends IConf {
 
     boolean cancelAfkOnInteract();
 
+    boolean cancelAfkOnChat();
+
     boolean sleepIgnoresAfkPlayers();
 
     boolean isAfkListName();

Essentials/src/main/java/com/earth2me/essentials/Settings.java

@@ -984,6 +984,11 @@ private boolean _cancelAfkOnInteract() {
         return config.getBoolean("cancel-afk-on-interact", true);
     }
 
+    @Override
+    public boolean cancelAfkOnChat() {
+        return config.getBoolean("cancel-afk-on-chat", true);
+    }
+
     @Override
     public boolean sleepIgnoresAfkPlayers() {
         return sleepIgnoresAfkPlayers;

Essentials/src/main/java/com/earth2me/essentials/User.java

@@ -668,6 +668,15 @@ public void updateActivityOnInteract(final boolean broadcast) {
         }
     }
 
+    public void updateActivityOnChat(final boolean broadcast) {
+        if (ess.getSettings().cancelAfkOnChat()) {
+            //Chat happens async, make sure we have a sync context
+            ess.scheduleSyncDelayedTask(() -> {
+                updateActivity(broadcast, AfkStatusChangeEvent.Cause.CHAT);
+            });
+        }
+    }
+
     public void checkActivity() {
         // Graceful time before the first afk check call. 
         if (System.currentTimeMillis() - lastActivity <= 10000) {

Essentials/src/main/java/net/ess3/api/events/AfkStatusChangeEvent.java

@@ -42,6 +42,7 @@ public enum Cause {
         INTERACT,
         COMMAND,
         JOIN,
+        CHAT,
         QUIT,
         UNKNOWN
     }

Essentials/src/main/resources/config.yml

@@ -450,6 +450,9 @@ cancel-afk-on-interact: true
 # Disable this to reduce server lag.
 cancel-afk-on-move: true
 
+# Should we automatically remove afk status when a player sends a chat message?
+cancel-afk-on-chat: true
+
 # Should AFK players be ignored when other players are trying to sleep?
 # When this setting is false, players won't be able to skip the night if some players are AFK.
 # Users with the permission node essentials.sleepingignored will always be ignored.