3.0.1 init commit

- Removed Go HTTP client UA
- Added optional bypass of websocket origin check #107
- Added basic forward proxy for debug
- Fixed UI error in network utils tab

src/mod/forwardproxy/cproxy/proxy_protocol_initializer.go

@@ -0,0 +1,36 @@
+package cproxy
+
+import (
+	"fmt"
+	"io"
+	"net"
+	"strings"
+)
+
+type proxyProtocolInitializer struct{}
+
+func newProxyProtocolInitializer() *proxyProtocolInitializer {
+	return &proxyProtocolInitializer{}
+}
+
+func (this *proxyProtocolInitializer) Initialize(client, server Socket) bool {
+	header := formatHeader(client.RemoteAddr(), server.RemoteAddr())
+	_, err := io.WriteString(server, header)
+	return err == nil
+}
+func formatHeader(client, server net.Addr) string {
+	clientAddress, clientPort := parseAddress(client.String())
+	serverAddress, serverPort := parseAddress(server.String())
+	if strings.Contains(clientAddress, ":") {
+		return fmt.Sprintf(proxyProtocolIPv6Preamble, clientAddress, serverAddress, clientPort, serverPort)
+	}
+
+	return fmt.Sprintf(proxyProtocolIPv4Preamble, clientAddress, serverAddress, clientPort, serverPort)
+}
+func parseAddress(address string) (string, string) {
+	address, port, _ := net.SplitHostPort(address)
+	return address, port
+}
+
+const proxyProtocolIPv4Preamble = "PROXY TCP4 %s %s %s %s\r\n"
+const proxyProtocolIPv6Preamble = "PROXY TCP6 %s %s %s %s\r\n"