Max joins per second

When this option is set to true the `max-joins-per-tick` setting in paper.yml will be used per second instead of per tick

Author: BillyGalbreath

patches/server/0228-Max-joins-per-second.patch

@@ -0,0 +1,23 @@
+--- a/net/minecraft/network/Connection.java
++++ b/net/minecraft/network/Connection.java
+@@ -588,11 +_,20 @@
+     private static final int MAX_PER_TICK = io.papermc.paper.configuration.GlobalConfiguration.get().misc.maxJoinsPerTick; // Paper - Buffer joins to world
+     private static int joinAttemptsThisTick; // Paper - Buffer joins to world
+     private static int currTick; // Paper - Buffer joins to world
++    private static int tickSecond; // Purpur - Max joins per second
+     public void tick() {
+         this.flushQueue();
+         // Paper start - Buffer joins to world
+         if (Connection.currTick != net.minecraft.server.MinecraftServer.currentTick) {
+             Connection.currTick = net.minecraft.server.MinecraftServer.currentTick;
++            // Purpur start - Max joins per second
++            if (org.purpurmc.purpur.PurpurConfig.maxJoinsPerSecond) {
++                if (++Connection.tickSecond > 20) {
++                    Connection.tickSecond = 0;
++                    Connection.joinAttemptsThisTick = 0;
++                }
++            } else
++            // Purpur end - Max joins per second
+             Connection.joinAttemptsThisTick = 0;
+         }
+         // Paper end - Buffer joins to world

purpur-server/minecraft-patches/sources/net/minecraft/network/Connection.java.patch

@@ -450,8 +450,10 @@ private static void tpsCatchup() {
     }
 
     public static boolean useUPnP = false;
+    public static boolean maxJoinsPerSecond = false;
     private static void networkSettings() {
         useUPnP = getBoolean("settings.network.upnp-port-forwarding", useUPnP);
+        maxJoinsPerSecond = getBoolean("settings.network.max-joins-per-second", maxJoinsPerSecond);
     }
 
     public static Pattern usernameValidCharactersPattern;