Reap websockify zombies. Add IE9 fix for websock.js.

Reap websockify zombies. Fixes:
https://github.com/kanaka/noVNC/issues#issue/47. Thanks NeilW.

Changes to get web-socket-js to work with IE9. Right now it's a hack to get
around: https://github.com/gimite/web-socket-js/issues#issue/41. The hack is to
disable caching of the flash objects by appending "?" + Math.random() to the
end of the flash object path (but only when using IE).

docs/TODO

@@ -3,3 +3,9 @@
 - create gevent version:
     http://nichol.as/benchmark-of-python-web-servers
     http://n01se.net/paste/QXO
+
+    - Need at least libevent-1.4 (i.e. not 9.04 Jaunty)
+
+    sudo aptitude install python-dev libevent-dev python-setuptools
+
+    sudo easy_install gevent

include/websock.js

@@ -32,7 +32,11 @@ if (window.WebSocket) {
             end = "'><\/script>", extra = "";
 
         WEB_SOCKET_SWF_LOCATION = get_INCLUDE_URI() +
-                    "web-socket-js/WebSocketMain.swf";
+                    "web-socket-js/WebSocketMain.swf?" + Math.random();
+        if (Util.Engine.trident) {
+            Util.Debug("Forcing uncached load of WebSocketMain.swf");
+            WEB_SOCKET_SWF_LOCATION += "?" + Math.random();
+        }
         extra += start + "web-socket-js/swfobject.js" + end;
         extra += start + "web-socket-js/FABridge.js" + end;
         extra += start + "web-socket-js/web_socket.js" + end;

websocket.py

@@ -315,8 +315,15 @@ Connection: Upgrade\r
         #self.vmsg("Running poll()")
         pass
 
+
+    def top_SIGCHLD(self, sig, stack):
+        # Reap zombies after calling child SIGCHLD handler
+        self.do_SIGCHLD(sig, stack)
+        self.vmsg("Got SIGCHLD, reaping zombies")
+        os.waitpid(-1, os.WNOHANG)
+
     def do_SIGCHLD(self, sig, stack):
-        self.vmsg("Got SIGCHLD, ignoring")
+        pass
 
     def do_SIGINT(self, sig, stack):
         self.msg("Got SIGINT, exiting")
@@ -345,7 +352,7 @@ Connection: Upgrade\r
         self.started()  # Some things need to happen after daemonizing
 
         # Reep zombies
-        signal.signal(signal.SIGCHLD, self.do_SIGCHLD)
+        signal.signal(signal.SIGCHLD, self.top_SIGCHLD)
         signal.signal(signal.SIGINT, self.do_SIGINT)
 
         while True: