webbuild.html, autobuilds.html: restrict xmlhttp to fix too many sockets pending in chromium bug

webbuild/html/autobuilds.html

@@ -21,6 +21,7 @@ var reloadtime = 0;
 
 function ajax_getvalues() {
   var url = window.location.protocol+"//"+window.location.hostname+"/cgi-bin/autodist?FORMAT=xml&"+window.location.href.replace(/.*\?/,"");
+  var xmlhttp;
   if (window.XMLHttpRequest)
     xmlhttp = new XMLHttpRequest();
   else if (window.ActiveXObject)

webbuild/html/webbuild.html

@@ -92,6 +92,7 @@ function editorChanged() {
 
 function ajax_getvalues(request,confirm) {
   var url = "/cgi-bin/webbuild"
+  var xmlhttp;
 
   if (!user) {
      user=getCookie("webbuild-user");