www cleanup mega commit:

- Move includes.nav*.sgml to share/sgml/navibar.ent and
   <lang>/share/sgml/navibar.l10n.ent.

 - Move includes.sgml and includes.xsl to
   share/sgml/common.ent, share/sgml/header.ent, <lang>/share/sgml/l10n.ent,
   and <lang>/share/sgml/header.l10n.ent.

 - Move most of XSLT libraries to share/sgml/*.xsl and
   <lang>/share/sgml/*.xsl.

 - Move news.xml and other *.xml files for the similar purpose
   to share/sgml/*.xml and <lang>/share/sgml/*.xml.

 - Switch to use a custom DTD for HTML document.  Now we use
   "-//FreeBSD//DTD HTML 4.01 Transitional-Based Extension", which is
   HTML 4.01 + some entities previously pulled via
   "<!ENTITY % includes SYSTEM "includes.sgml"> %includes;" line.
   The location of entity file will be resolved by using catalog file.

 - Add DOCTYPE declearation to XML documents.  This makes the followings
   possible:

   * Use of &foo; entities for SGML in an XML file instead of defining
     {$foo} as the same content.

   * &symbolic; entities for Latin characters.

 - Duplicated information between SGML and XML, or English and
   translated doc, has been removed as much as possible.

zh_CN/share/sgml/libcommon.xsl

@@ -0,0 +1,87 @@
+<?xml version="1.0" encoding="gb2312" ?>
+<!DOCTYPE xsl:stylesheet PUBLIC "-//FreeBSD//DTD FreeBSD XSLT 1.0 DTD//EN"
+				"http://www.FreeBSD.org/XML/www/share/sgml/xslt10-freebsd.dtd">
+<!-- $FreeBSD$ -->
+
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
+  <xsl:import href="http://www.FreeBSD.org/XML/www/share/sgml/libcommon.xsl"/>
+
+  <xsl:template name="html-news-list-newsflash-preface">
+    <img src="&enbase;/gifs/news.jpg" align="right" border="0" width="193"
+      height="144" alt="Nouvelles FreeBSD"/>
+
+    <p>FreeBSD 是一个正在迅速开发着的操作系统。
+      保持一个最终的开发版是比较繁琐的！你可以定期来查看这个页面，同样，你可能希望订阅
+      <a href="&enbase;/doc/&url.doc.langcode;/books/handbook/eresources.html#ERESOURCES-MAIL">freebsd-announce
+	邮件列表</a> 或使用 <a href="news.rdf">RSS feed</a>。</p>
+
+    <p>下列的每个项目都有自己的新闻页面，里面包含这些项目的详细更新。</p>
+
+    <ul>
+      <li><a href="&enbase;/java/newsflash.html">FreeBSD 上的 &java;</a></li>
+      <li><a href="http://freebsd.kde.org/">FreeBSD 上的 KDE</a></li>
+      <li><a href="&enbase;/gnome/newsflash.html">FreeBSD 上的 GNOME</a></li>
+    </ul>
+	  
+    <p>更详细的描述，介绍，和将来的发行版本，请看<strong><a
+	  href="&base;/releases/index.html">版本信息</a></strong>页面。</p>
+	
+    <p>对于 FreeBSD 的安全公告， 请访问 <a href="&base;/security/#adv">安全信息</a> 页面。</p>
+  </xsl:template>
+
+  <xsl:template name="html-news-list-newsflash-homelink">
+    <a href="&base;/news/news.html">新闻首页</a>
+  </xsl:template>
+
+  <xsl:template name="html-news-make-olditems-list">
+    <p>更早的公告：
+      <a href="&enbase;/news/2003/index.html">2003</a>,
+      <a href="&enbase;/news/2002/index.html">2002</a>,
+      <a href="&enbase;/news/2001/index.html">2001</a>,
+      <a href="&enbase;/news/2000/index.html">2000</a>,
+      <a href="&enbase;/news/1999/index.html">1999</a>,
+      <a href="&enbase;/news/1998/index.html">1998</a>,
+      <a href="&enbase;/news/1997/index.html">1997</a>,
+      <a href="&enbase;/news/1996/index.html">1996</a></p>
+  </xsl:template>
+
+  <xsl:variable name="html-news-list-press-homelink">
+    <a href="&base;/news/press.html">媒体报道首页</a>
+  </xsl:variable>
+
+  <xsl:template name="html-news-list-press-preface">
+    <p>如果您知道我们没有在这里列出的关于 FreeBSD 的消息， 请致信
+      <a href="mailto:www@FreeBSD.org">www@FreeBSD.org</a> 以便我们把它添加进去。</p>
+  </xsl:template>
+
+  <xsl:template name="html-events-list-preface">
+  </xsl:template>
+
+  <xsl:template name="html-events-list-upcoming-heading">
+  </xsl:template>
+
+  <xsl:template name="html-events-list-past-heading">
+  </xsl:template>
+
+  <!-- Convert a month number to the corresponding long English name. -->
+  <xsl:template name="gen-long-en-month">
+    <xsl:param name="nummonth"/>
+    <xsl:variable name="month" select="number($nummonth)"/>
+    <xsl:choose>
+      <xsl:when test="$month=1">Janvier</xsl:when>
+      <xsl:when test="$month=2">F&#233;vrier</xsl:when>
+      <xsl:when test="$month=3">Mars</xsl:when>
+      <xsl:when test="$month=4">Avril</xsl:when>
+      <xsl:when test="$month=5">Mai</xsl:when>
+      <xsl:when test="$month=6">Juin</xsl:when>
+      <xsl:when test="$month=7">Juillet</xsl:when>
+      <xsl:when test="$month=8">Ao&#251;t</xsl:when>
+      <xsl:when test="$month=9">Septembre</xsl:when>
+      <xsl:when test="$month=10">Octobre</xsl:when>
+      <xsl:when test="$month=11">Novembre</xsl:when>
+      <xsl:when test="$month=12">D&#233;cembre</xsl:when>
+      <xsl:otherwise>Mois invalide</xsl:otherwise>
+    </xsl:choose>
+  </xsl:template>
+
+</xsl:stylesheet>