Replacing Networking (#271)

- [X] Removing Kestrel & Libuv
- [X] Cleaning up NetState
- [X] Removing System.IO.Pipelines
- [X] Cleaning up packet reading
- [X] Adds a maximum of 5000 sockets (configurable) to prevent OOM
- [X] Replaces the AsyncState with a thread-safe wrapped boolean called NetworkState
- [X] Removes Parallel.ForEach (no perf gain)
- [X] Removes custom houses compression on another thread
- [X] Test high load scenarios

Bumps release version

Projects/Server/Utilities/Utility.cs

@@ -14,7 +14,7 @@ namespace Server
 {
     public static class Utility
     {
-        private static Encoding m_UTF8, m_UTF8WithEncoding;
+        private static Encoding m_UTF8, m_UTF8WithEncoding, m_Unicode, m_UnicodeLE;
 
         private static Dictionary<IPAddress, IPAddress> _ipAddressTable;
 
@@ -103,6 +103,8 @@ namespace Server
 
         public static Encoding UTF8 => m_UTF8 ??= new UTF8Encoding(false, false);
         public static Encoding UTF8WithEncoding => m_UTF8WithEncoding ??= new UTF8Encoding(true, false);
+        public static Encoding Unicode => m_Unicode ??= new UnicodeEncoding(true, false, false);
+        public static Encoding UnicodeLE => m_UnicodeLE ??= new UnicodeEncoding(false, false, false);
 
         public static void Separate(StringBuilder sb, string value, string separator)
         {
@@ -126,6 +128,11 @@ namespace Server
 
         public static IPAddress Intern(IPAddress ipAddress)
         {
+            if (ipAddress == null)
+            {
+                return null;
+            }
+
             _ipAddressTable ??= new Dictionary<IPAddress, IPAddress>();
 
             if (!_ipAddressTable.TryGetValue(ipAddress, out var interned))