Update sites.php

- Removes comments of old pages that will never come online again
- Removes http://gcov.php.net as this website was shut down
- Adds https://windows.php.net

Closes GH-517.

sites.php

@@ -169,37 +169,6 @@ site_header("A Tourist's Guide", array("current" => "help"));
  i.e. documentation files.
 </p>
 
-<!--
-XXX: The following sites are offline and should be re-added once they are back online in a more permanent state (Kalle, 17/10/2017)
-
-<h2 id="cvs" class="content-header"><a href="http://cvsold.php.net/">cvsold.php.net</a>: Archived CVS Repository</h2>
-
-<p class="content-box">
- The PHP project used to be organized under the CVS revision control system, but
- migrated to <a href="http://svn.php.net/">Subversion</a> (see above) in July of 2009.
- The old CVS repository is archived here for posterity. It was formerly named
- cvs.php.net, but that now redirects to the SVN repository. This is not available
- via HTTP.
-</p>
-
-<h2 id="lxr" class="content-header"><a href="http://lxr.php.net/">lxr.php.net</a>: Cross Reference</h2>
-
-<div  class="content-box">
-<p>
- <a href="http://www.opensolaris.org/os/project/opengrok/">OpenGrok</a> allows
- search and viewing of the PHP source code in an intelligent manner. Several branches
- and sub-projects are listed.
- Any time an important macro or function is detected within the code, it is linked
- to its definition, and all its usage locations. This will help you build your code
- and understand the PHP source.
-</p>
-<p>
- The name "lxr" exists as it was once based on the "Linux Cross Reference", but
- changed over to OpenGrok sometime in 2010.
-</p>
-</div>
--->
-
 <h2 id="gtk" class="content-header"><a href="http://gtk.php.net/">gtk.php.net</a>: PHP-GTK</h2>
 
 <p class="content-box">
@@ -209,15 +178,6 @@ XXX: The following sites are offline and should be re-added once they are back o
  and the latest news from the project.
 </p>
 
-<h2 id="gcov" class="content-header"><a href="http://gcov.php.net/">gcov.php.net</a>: Test and Code Coverage analysis</h2>
-
-<p class="content-box">
- This site is dedicated to automatic PHP code coverage testing. On a regular
- basis current Git snapshots are being build and tested on this machine. After
- all tests are done the results are visualized along with a code coverage
- analysis.
-</p>
-
 <h2 id="wiki" class="content-header"><a href="https://wiki.php.net/">wiki.php.net</a>: The PHP Wiki</h2>
 
 <p class="content-box">
@@ -226,6 +186,13 @@ XXX: The following sites are offline and should be re-added once they are back o
  has a wiki section and everyone is able to apply for wiki commit access.
 </p>
 
+<h2 id="windows" class="content-header"><a href="https://windows.php.net/">windows.php.net</a>: PHP for Windows</h2>
+
+<p class="content-box">
+ This site is dedicated to supporting PHP on Microsoft Windows. 
+ It also supports ports of PHP extensions or features as well as providing special builds for the various Windows architectures.
+</p>
+
 <h2 id="people" class="content-header"><a href="https://people.php.net/">people.php.net</a>: The PHP Developers Profiles</h2>
 
 <p class="content-box">
@@ -233,13 +200,6 @@ XXX: The following sites are offline and should be re-added once they are back o
 </p>
 
 <?php
-/*
-XXX: The following sites are offline and should be re-added once they are back online in a more permanent state (Kalle, 17/10/2017)
-
-<p class='panel'><a href="#cvs">Archived CVS Repository</a></p>
-<p class='panel'><a href="#lxr">Cross Reference</a></p>
-
-*/
 
 $SIDEBAR = <<< SIDEBAR_DATA
 
@@ -255,8 +215,8 @@ $SIDEBAR = <<< SIDEBAR_DATA
 <p class='panel'><a href="#git">Git Repository</a></p>
 <p class='panel'><a href="#svn">Archived SVN Repository</a></p>
 <p class='panel'><a href="#gtk">PHP-GTK</a></p>
-<p class='panel'><a href="#gcov">Test and Code Coverage analysis</a></p>
 <p class='panel'><a href="#wiki">The PHP Wiki</a></h2>
+<p class='panel'><a href="#windows">PHP for Windows</a></h2>
 <p class='panel'><a href="#people">The PHP Developers Profiles</a></h2>
 
 SIDEBAR_DATA;