Removed url.pecl.windows.releases entity (and rewrote) to help with php/doc-base#143

Author: philip

install/windows/manual.xml

@@ -45,9 +45,8 @@
  <simplesect xml:id="install.windows.pecl" annotations="chunk:false">
   <title>Pre-built PECL Extensions</title>
   <para>
-   PECL extensions that are pre-built for Windows are available from
-   <link xlink:href="&url.pecl.windows.releases;">the PECL downloads
-   section of the PHP Windows website</link>.
+   Pre-built Windows versions of PECL extensions are distributed as DLL
+   files on the extension's PECL page.
   </para>
   <para>
    Binaries are not available for extensions that use features specific