windows: Unicode and IPv6 http/sockets

cleanup schannel implementation (drop NT4.0 compatibility, use unicode strings, etc)
restore http tests
fix socket test: it did not throw before

vlib/net/socket.v

@@ -176,9 +176,11 @@ pub fn (s Socket) connect(address string, port int) ?int {
 	hints.ai_family = C.AF_UNSPEC
 	hints.ai_socktype = C.SOCK_STREAM
 	hints.ai_flags = C.AI_PASSIVE
+	hints.ai_protocol = 0
 	hints.ai_addrlen = 0
 	hints.ai_canonname = C.NULL
 	hints.ai_addr = C.NULL
+	hints.ai_next = C.NULL
 	
 
 	info := &C.addrinfo{!}

vlib/net/socket_test.v

@@ -2,17 +2,14 @@ import net
 
 fn test_socket() {
 	mut server := net.listen(0) or {
-		println(err)
-		return
+		panic(err)
 	}
 	server_port := server.get_port()
 	mut client := net.dial('127.0.0.1', server_port) or {
-		println(err)
-		return
+		panic(err)
 	}
 	mut socket := server.accept() or {
-		println(err)
-		return
+		panic(err)
 	}
 	
 	message := 'Hello World'