Use abstract SocketListener class

Makes the code more general and not directly tied to specifically
TCP sockets.
diff --git a/unix/x0vncserver/x0vncserver.cxx b/unix/x0vncserver/x0vncserver.cxx
index c8098f7..db91797 100644
--- a/unix/x0vncserver/x0vncserver.cxx
+++ b/unix/x0vncserver/x0vncserver.cxx
@@ -291,7 +291,7 @@
   signal(SIGINT, CleanupSignalHandler);
   signal(SIGTERM, CleanupSignalHandler);
 
-  std::list<TcpListener*> listeners;
+  std::list<SocketListener*> listeners;
 
   try {
     TXWindow::init(dpy,"x0vncserver");
@@ -313,7 +313,7 @@
     const char *hostsData = hostsFile.getData();
     FileTcpFilter fileTcpFilter(hostsData);
     if (strlen(hostsData) != 0)
-      for (std::list<TcpListener*>::iterator i = listeners.begin();
+      for (std::list<SocketListener*>::iterator i = listeners.begin();
            i != listeners.end();
            i++)
         (*i)->setFilter(&fileTcpFilter);
@@ -335,7 +335,7 @@
       FD_ZERO(&wfds);
 
       FD_SET(ConnectionNumber(dpy), &rfds);
-      for (std::list<TcpListener*>::iterator i = listeners.begin();
+      for (std::list<SocketListener*>::iterator i = listeners.begin();
            i != listeners.end();
            i++)
         FD_SET((*i)->getFd(), &rfds);
@@ -387,7 +387,7 @@
       }
 
       // Accept new VNC connections
-      for (std::list<TcpListener*>::iterator i = listeners.begin();
+      for (std::list<SocketListener*>::iterator i = listeners.begin();
            i != listeners.end();
            i++) {
         if (FD_ISSET((*i)->getFd(), &rfds)) {
diff --git a/unix/xserver/hw/vnc/RFBGlue.cc b/unix/xserver/hw/vnc/RFBGlue.cc
index c915336..c09dfe6 100644
--- a/unix/xserver/hw/vnc/RFBGlue.cc
+++ b/unix/xserver/hw/vnc/RFBGlue.cc
@@ -199,7 +199,7 @@
 {
   try {
     // Attempt to create TCPListeners on that port.
-    std::list<network::TcpListener*> dummy;
+    std::list<network::SocketListener*> dummy;
     network::createTcpListeners (&dummy, 0, port);
     while (!dummy.empty()) {
       delete dummy.back();
diff --git a/unix/xserver/hw/vnc/XserverDesktop.cc b/unix/xserver/hw/vnc/XserverDesktop.cc
index 080943d..4aac765 100644
--- a/unix/xserver/hw/vnc/XserverDesktop.cc
+++ b/unix/xserver/hw/vnc/XserverDesktop.cc
@@ -32,7 +32,7 @@
 #include <fcntl.h>
 #include <sys/utsname.h>
 
-#include <network/TcpSocket.h>
+#include <network/Socket.h>
 #include <rfb/Exception.h>
 #include <rfb/VNCServerST.h>
 #include <rfb/HTTPServer.h>
@@ -107,8 +107,8 @@
 
 
 XserverDesktop::XserverDesktop(int screenIndex_,
-                               std::list<network::TcpListener*> listeners_,
-                               std::list<network::TcpListener*> httpListeners_,
+                               std::list<network::SocketListener*> listeners_,
+                               std::list<network::SocketListener*> httpListeners_,
                                const char* name, const rfb::PixelFormat &pf,
                                int width, int height,
                                void* fbptr, int stride)
@@ -127,13 +127,13 @@
   if (!httpListeners.empty ())
     httpServer = new FileHTTPServer(this);
 
-  for (std::list<TcpListener*>::iterator i = listeners.begin();
+  for (std::list<SocketListener*>::iterator i = listeners.begin();
        i != listeners.end();
        i++) {
     vncSetNotifyFd((*i)->getFd(), screenIndex, true, false);
   }
 
-  for (std::list<TcpListener*>::iterator i = httpListeners.begin();
+  for (std::list<SocketListener*>::iterator i = httpListeners.begin();
        i != httpListeners.end();
        i++) {
     vncSetNotifyFd((*i)->getFd(), screenIndex, true, false);
@@ -386,10 +386,10 @@
 }
 
 bool XserverDesktop::handleListenerEvent(int fd,
-                                         std::list<TcpListener*>* sockets,
+                                         std::list<SocketListener*>* sockets,
                                          SocketServer* sockserv)
 {
-  std::list<TcpListener*>::iterator i;
+  std::list<SocketListener*>::iterator i;
 
   for (i = sockets->begin(); i != sockets->end(); i++) {
     if ((*i)->getFd() == fd)
diff --git a/unix/xserver/hw/vnc/XserverDesktop.h b/unix/xserver/hw/vnc/XserverDesktop.h
index f1c3e3e..f866a4c 100644
--- a/unix/xserver/hw/vnc/XserverDesktop.h
+++ b/unix/xserver/hw/vnc/XserverDesktop.h
@@ -44,7 +44,7 @@
   class VNCServerST;
 }
 
-namespace network { class TcpListener; class Socket; class SocketServer; }
+namespace network { class SocketListener; class Socket; class SocketServer; }
 
 class XserverDesktop : public rfb::SDesktop, public rfb::FullFramePixelBuffer,
                        public rdr::Substitutor,
@@ -53,8 +53,8 @@
 public:
 
   XserverDesktop(int screenIndex,
-                 std::list<network::TcpListener*> listeners_,
-                 std::list<network::TcpListener*> httpListeners_,
+                 std::list<network::SocketListener*> listeners_,
+                 std::list<network::SocketListener*> httpListeners_,
                  const char* name, const rfb::PixelFormat &pf,
                  int width, int height, void* fbptr, int stride);
   virtual ~XserverDesktop();
@@ -109,7 +109,7 @@
 
 protected:
   bool handleListenerEvent(int fd,
-                           std::list<network::TcpListener*>* sockets,
+                           std::list<network::SocketListener*>* sockets,
                            network::SocketServer* sockserv);
   bool handleSocketEvent(int fd,
                          network::SocketServer* sockserv,
@@ -122,8 +122,8 @@
   int screenIndex;
   rfb::VNCServerST* server;
   rfb::HTTPServer* httpServer;
-  std::list<network::TcpListener*> listeners;
-  std::list<network::TcpListener*> httpListeners;
+  std::list<network::SocketListener*> listeners;
+  std::list<network::SocketListener*> httpListeners;
   bool directFbptr;
 
   uint32_t queryConnectId;
diff --git a/unix/xserver/hw/vnc/vncExtInit.cc b/unix/xserver/hw/vnc/vncExtInit.cc
index 54cca95..f267451 100644
--- a/unix/xserver/hw/vnc/vncExtInit.cc
+++ b/unix/xserver/hw/vnc/vncExtInit.cc
@@ -173,8 +173,8 @@
     for (int scr = 0; scr < vncGetScreenCount(); scr++) {
 
       if (!desktop[scr]) {
-        std::list<network::TcpListener*> listeners;
-        std::list<network::TcpListener*> httpListeners;
+        std::list<network::SocketListener*> listeners;
+        std::list<network::SocketListener*> httpListeners;
         if (scr == 0 && vncInetdSock != -1) {
           if (network::TcpSocket::isListening(vncInetdSock))
           {