Remove dead code in PAGE-URL.

We partially support 'pretty URLs'. They can be achieved by setting
:page-ext in the *config* to "/" and configuring the web server to
ignore html extensions.

src/coleslaw.lisp

   (:documentation "The url to the object, without the domain."))
 
 (defmethod page-url :around ((object t))
-  (let ((result (call-next-method))
-        (extension (if (string= (page-ext *config*) "/")
-                       "html"
-                       (page-ext *config*))))
+  (let ((result (call-next-method)))
     (if (pathname-type result)
         result
-        (make-pathname :type extension :defaults result))))
+        (make-pathname :type (page-ext *config*) :defaults result))))
 
 (defun page-path (object)
   "The path to store OBJECT at once rendered."

themes/atom.tmpl

 
   {foreach $post in $content.posts}
   <entry>
-    <link type="text/html" rel="alternate" href="{$config.domain}/posts/{$post.slug}.html"/>
+    <link type="text/html" rel="alternate" href="{$config.domain}/posts/{$post.slug}{$config.pageExt}"/>
     <title>{$post.title}</title>
     <published>{$post.date}</published>
     <updated>{$post.date}</updated>

themes/hyde/index.tmpl

 <h1 class="title">{$index.title}</h1>
 {foreach $post in $index.posts}
   <div class="article-meta">
-    <a class="article-title" href="{$config.domain}/posts/{$post.slug}.html">{$post.title}</a>
+    <a class="article-title" href="{$config.domain}/posts/{$post.slug}{$config.pageExt}">{$post.title}</a>
     <div class="date"> posted on {$post.date}</div>
     <div class="article">{$post.text |noAutoescape}</div>
   </div>
 {/foreach}
 <div id="relative-nav">
-  {if $prev} <a href="{$prev}.html">Previous</a> {/if}
-  {if $next} <a href="{$next}.html">Next</a> {/if}
+  {if $prev} <a href="{$prev}{$config.pageExt}">Previous</a> {/if}
+  {if $next} <a href="{$next}{$config.pageExt}">Next</a> {/if}
 </div>
 {if $tags}
 <div id="tagsoup">
   <p>This blog covers
     {foreach $tag in $tags}
-      <a href="{$config.domain}/tag/{$tag.slug}.html">{$tag.name}</a>{nil}
+      <a href="{$config.domain}/tag/{$tag.slug}{$config.pageExt}">{$tag.name}</a>{nil}
       {if not isLast($tag)},{sp}{/if}
     {/foreach}
 </div>
 <div id="monthsoup">
   <p>View posts from
     {foreach $month in $months}
-      <a href="{$config.domain}/date/{$month}.html">{$month}</a>{nil}
+      <a href="{$config.domain}/date/{$month}{$config.pageExt}">{$month}</a>{nil}
       {if not isLast($month)},{sp}{/if}
     {/foreach}
 </div>

themes/hyde/post.tmpl

   <h1 class="title">{$post.title}</h1>{\n}
   <div class="tags">{\n}
     Tagged as {foreach $tag in $post.tags}
-                <a href="../tag/{$tag.slug}.html">{$tag.name}</a>{nil}
+                <a href="../tag/{$tag.slug}{$config.pageExt}">{$tag.name}</a>{nil}
                     {if not isLast($tag)},{sp}{/if}
               {/foreach}
   </div>{\n}
   {$post.text |noAutoescape}
 </div>{\n}
 <div class="relative-nav">{\n}
-  {if $prev} <a href="{$config.domain}/posts/{$prev.slug}.html">Previous</a><br> {/if}{\n}
-  {if $next} <a href="{$config.domain}/posts/{$next.slug}.html">Next</a><br> {/if}{\n}
+  {if $prev} <a href="{$config.domain}/posts/{$prev.slug}{$config.pageExt}">Previous</a><br> {/if}{\n}
+  {if $next} <a href="{$config.domain}/posts/{$next.slug}{$config.pageExt}">Next</a><br> {/if}{\n}
 </div>{\n}
 {/template}

themes/readable/index.tmpl

 <h1 class="page-header">{$index.title}</h1>
 {foreach $post in $index.posts}
   <div class="row-fluid">
-    <h1><a href="{$config.domain}/posts/{$post.slug}.html">{$post.title}</a></h1>
+    <h1><a href="{$config.domain}/posts/{$post.slug}{$config.pageExt}">{$post.title}</a></h1>
     <p class="date-posted">posted on {$post.date}</p>
     {$post.text |noAutoescape}
   </div>
 <div class="row-fluid">
   <p>This blog covers
     {foreach $tag in $tags}
-      <a href="{$config.domain}/tag/{$tag.slug}.html">{$tag.name}</a>{nil}
+      <a href="{$config.domain}/tag/{$tag.slug}{$config.pageExt}">{$tag.name}</a>{nil}
       {if not isLast($tag)},{sp}{/if}
     {/foreach}
   </p>
 <div class="row-fluid">
   <p>View posts from
     {foreach $month in $months}
-      <a href="{$config.domain}/date/{$month}.html">{$month}</a>{nil}
+      <a href="{$config.domain}/date/{$month}{$config.pageExt}">{$month}</a>{nil}
       {if not isLast($month)},{sp}{/if}
     {/foreach}
   </p>

themes/readable/post.tmpl

   <h1 class="page-header">{$post.title}</h1>{\n}
   <p>Tagged as 
     {foreach $tag in $post.tags}
-      <a href="../tag/{$tag.slug}.html">{$tag.name}</a>{nil}
+      <a href="../tag/{$tag.slug}{$config.pageExt}">{$tag.name}</a>{nil}
       {if not isLast($tag)},{sp}{/if}
     {/foreach}
   </p>
   {$post.text |noAutoescape}
   
   <ul class="pager">
-    {if $prev}<li class="previous"><a href="{$config.domain}/posts/{$prev.slug}.html">&larr; Previous</a></li>{/if}{\n}
-    {if $next}<li class="next"><a href="{$config.domain}/posts/{$next.slug}.html">Next &rarr;</a></li>{/if}{\n}
+    {if $prev}<li class="previous"><a href="{$config.domain}/posts/{$prev.slug}{$config.pageExt}">&larr; Previous</a></li>{/if}{\n}
+    {if $next}<li class="next"><a href="{$config.domain}/posts/{$next.slug}{$config.pageExt}">Next &rarr;</a></li>{/if}{\n}
   </ul>
 </div>{\n}
 {/template}

themes/rss.tmpl

     {foreach $post in $content.posts}
     <item>
       <title>{$post.title}</title>
-      <link>{$config.domain}/posts/{$post.slug}.html</link>
+      <link>{$config.domain}/posts/{$post.slug}{$config.pageExt}</link>
       <pubDate>{$post.date}</pubDate>
       <author>{$config.author}</author>
-      <guid isPermaLink="true">{$config.domain}/posts/{$post.slug}.html</guid>
+      <guid isPermaLink="true">{$config.domain}/posts/{$post.slug}{$config.pageExt}</guid>
       {foreach $tag in $post.tags}
         <category><![CDATA[ {$tag} ]]></category>
       {/foreach}