Fix missing ServerListPingEvent call for legacy pings

nms-patches/LegacyPingHandler.patch

@@ -0,0 +1,34 @@
+--- a/net/minecraft/server/LegacyPingHandler.java
++++ b/net/minecraft/server/LegacyPingHandler.java
+@@ -34,11 +34,12 @@
+             MinecraftServer minecraftserver = this.b.d();
+             int i = bytebuf.readableBytes();
+             String s;
++            org.bukkit.event.server.ServerListPingEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callServerListPingEvent(minecraftserver.server, inetsocketaddress.getAddress(), minecraftserver.getMotd(), minecraftserver.y(), minecraftserver.z()); // CraftBukkit
+ 
+             switch (i) {
+             case 0:
+                 LegacyPingHandler.a.debug("Ping: (<1.3.x) from {}:{}", inetsocketaddress.getAddress(), inetsocketaddress.getPort());
+-                s = String.format("%s\u00a7%d\u00a7%d", new Object[] { minecraftserver.getMotd(), minecraftserver.y(), minecraftserver.z()});
++                s = String.format("%s\u00a7%d\u00a7%d", new Object[] { event.getMotd(), event.getNumPlayers(), event.getMaxPlayers()}); // CraftBukkit
+                 this.a(channelhandlercontext, this.a(s));
+                 break;
+             case 1:
+@@ -47,7 +48,7 @@
+                 }
+ 
+                 LegacyPingHandler.a.debug("Ping: (1.4-1.5.x) from {}:{}", inetsocketaddress.getAddress(), inetsocketaddress.getPort());
+-                s = String.format("\u00a71\u0000%d\u0000%s\u0000%s\u0000%d\u0000%d", new Object[] { 127, minecraftserver.getVersion(), minecraftserver.getMotd(), minecraftserver.y(), minecraftserver.z()});
++                s = String.format("\u00a71\u0000%d\u0000%s\u0000%s\u0000%d\u0000%d", new Object[] { 127, minecraftserver.getVersion(), event.getMotd(), event.getNumPlayers(), event.getMaxPlayers()}); // CraftBukkit
+                 this.a(channelhandlercontext, this.a(s));
+                 break;
+             default:
+@@ -66,7 +67,7 @@
+                 }
+ 
+                 LegacyPingHandler.a.debug("Ping: (1.6) from {}:{}", inetsocketaddress.getAddress(), inetsocketaddress.getPort());
+-                String s1 = String.format("\u00a71\u0000%d\u0000%s\u0000%s\u0000%d\u0000%d", new Object[] { 127, minecraftserver.getVersion(), minecraftserver.getMotd(), minecraftserver.y(), minecraftserver.z()});
++                String s1 = String.format("\u00a71\u0000%d\u0000%s\u0000%s\u0000%d\u0000%d", new Object[] { 127, minecraftserver.getVersion(), event.getMotd(), event.getNumPlayers(), event.getMaxPlayers()}); // CraftBukkit
+                 ByteBuf bytebuf1 = this.a(s1);
+ 
+                 try {