Added per player time support. Thanks eisental, Shamebot and needspeed10!

By: EvilSeph <evilseph@unaligned.org>

paper-server/src/main/java/org/bukkit/craftbukkit/CraftWorld.java

@@ -424,7 +424,7 @@ public class CraftWorld implements World {
         // Forces the client to update to the new time immediately
         for (Player p: getPlayers()) {
             CraftPlayer cp = (CraftPlayer) p;
-            cp.getHandle().netServerHandler.sendPacket(new Packet4UpdateTime(time));
+            cp.getHandle().netServerHandler.sendPacket(new Packet4UpdateTime(cp.getHandle().getPlayerTime()));
         }
     }
 

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java

@@ -297,4 +297,25 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
 
         getHandle().netServerHandler.sendPacket(new Packet200Statistic(id, amount));
     }
+
+    public void setPlayerTime(long time, boolean relative) {
+        getHandle().timeOffset = time;
+        getHandle().relativeTime = relative;
+    }
+
+    public long getPlayerTimeOffset() {
+        return getHandle().timeOffset;
+    }
+
+    public long getPlayerTime() {
+        return getHandle().getPlayerTime();
+    }
+
+    public boolean isPlayerTimeRelative() {
+        return getHandle().relativeTime;
+    }
+
+    public void resetPlayerTime() {
+        setPlayerTime(0, true);
+    }
 }