- Re-implement WinDivertHelperParseIPv6Address(). Previous version was just

too bug-prone, so re-try from scratch.  New version works for several tests.
- Fix broken WinDivertAToX().
- New test case: IPv6 TCP SYN.

test/test_data.c

@@ -103,6 +103,21 @@ static unsigned char http_request[] =
     0x0a 
 };
 
+// IPV6 TCP SYN
+static unsigned char ipv6_tcp_syn[] =
+{
+    0x60, 0x00, 0x00, 0x00, 0x00, 0x28, 0x06, 0x40,
+    0x12, 0x34, 0x56, 0x78, 0x00, 0x01, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0xaa, 0xbb, 0xcc, 0xdd,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
+    0xc3, 0x7e, 0x00, 0x17, 0xe1, 0xd7, 0xc8, 0xaa,
+    0x00, 0x00, 0x00, 0x00, 0xa0, 0x02, 0xaa, 0xaa,
+    0x00, 0x00, 0x00, 0x00, 0x02, 0x04, 0xff, 0xc4,
+    0x04, 0x02, 0x08, 0x0a, 0xff, 0xff, 0x91, 0x86,
+    0x00, 0x00, 0x00, 0x00, 0x01, 0x03, 0x03, 0x07            
+};
+
 // IPV6 EXTENSION HEADERS UDP 
 static unsigned char ipv6_exthdrs_udp[] =
 {