Added UTF-8 support

You can now send UTF-8 encoded characters through PRoCon to the server.
However, RCON itself is not sending UTF-8 encoded characters.

So, PRoCon now can send UTF-8 encoded characters, but can't receive
them.

This is ofcourse also working for Plugins, but keep in mind that you
have to save your Plugin in UTF-8 format for this to work.

Author: Kai

src/PRoCon.Core/Remote/Packet.cs

@@ -181,12 +181,16 @@ public byte[] EncodePacket() {
                     strWord = strWord.Substring(0, UInt16.MaxValue - 1);
                 }
 
-                byte[] appendEncodedWords = new byte[encodedWords.Length + strWord.Length + 5];
+                // Convert the word into a null terminated utf-8 string
+                byte[] byteWord = Encoding.UTF8.GetBytes(strWord + Convert.ToChar(0x00));
+
+                byte[] appendEncodedWords = new byte[encodedWords.Length + byteWord.Length + 4];
 
                 encodedWords.CopyTo(appendEncodedWords, 0);
 
-                BitConverter.GetBytes(strWord.Length).CopyTo(appendEncodedWords, encodedWords.Length);
-                Encoding.GetEncoding(1252).GetBytes(strWord + Convert.ToChar(0x00)).CopyTo(appendEncodedWords, encodedWords.Length + 4);
+                // append the actual word size (ignoring the null terminated character) and word
+                BitConverter.GetBytes(byteWord.Length - 1).CopyTo(appendEncodedWords, encodedWords.Length);
+                byteWord.CopyTo(appendEncodedWords, encodedWords.Length + 4);
 
                 encodedWords = appendEncodedWords;
             }
@@ -223,7 +227,7 @@ public void DecodePacket(byte[] rawPacket) {
             for (UInt32 ui32WordCount = 0; ui32WordCount < ui32Words; ui32WordCount++) {
                 UInt32 ui32WordLength = BitConverter.ToUInt32(rawPacket, Packet.PacketHeaderSize + iWordOffset);
 
-                this.Words.Add(Encoding.GetEncoding(1252).GetString(rawPacket, Packet.PacketHeaderSize + iWordOffset + 4, (int)ui32WordLength));
+                this.Words.Add(Encoding.UTF8.GetString(rawPacket, Packet.PacketHeaderSize + iWordOffset + 4, (int)ui32WordLength));
 
                 iWordOffset += Convert.ToInt32(ui32WordLength) + 5; // WordLength + WordSize + NullByte
             }