Add some cache expiration directives to the .htaccess file

SF's project web servers implement a caching system to speed up
website loading times, but this makes website testing difficult on
short timescales. These ExpiresByType directives are obeyed by the caching
system, and can be adjusted to speed up future development.

Author: d-lamb

.htaccess

@@ -3,3 +3,39 @@ rewritecond %{http_host} ^pdl.sourceforge.net [nc]
 rewriterule ^(.*)$ http://pdl.perl.org/$1 [r=301,nc]
 
 Redirect permanent /PDLdocs/Intro.html http://pdl.perl.org/PDLdocs/PDL.html
+
+#Expires Rules modified from https://gist.github.com/boogah/1842173
+<IfModule mod_expires.c>
+  ExpiresActive on
+
+# Perhaps better to whitelist expires rules? Perhaps.
+  ExpiresDefault                          "access plus 0 seconds"
+
+# Data
+  ExpiresByType text/html		  "access plus 0 seconds"
+  ExpiresByType text/xml                  "access plus 0 seconds"
+  ExpiresByType application/xml           "access plus 0 seconds"
+  ExpiresByType application/json          "access plus 0 seconds"
+
+# Favicon (cannot be renamed)
+  ExpiresByType image/x-icon              "access plus 1 week"
+
+# Media: images, video, audio
+  ExpiresByType image/gif                 "access plus 1 month"
+  ExpiresByType image/png                 "access plus 1 month"
+  ExpiresByType image/jpeg                "access plus 1 month"
+  ExpiresByType video/mp4                 "access plus 1 month"
+  ExpiresByType video/mpeg		  "access plus 1 month"
+
+# Webfonts
+  ExpiresByType application/x-font-ttf    "access plus 1 month"
+  ExpiresByType font/opentype             "access plus 1 month"
+  ExpiresByType application/x-font-woff   "access plus 1 month"
+  ExpiresByType image/svg+xml             "access plus 1 month"
+  ExpiresByType application/vnd.ms-fontobject "access plus 1 month"
+
+# CSS and JavaScript
+  ExpiresByType text/css                  "access plus 0 seconds"
+  ExpiresByType application/javascript    "access plus 1 year"
+
+</IfModule>