Add cache/.htaccess code to the vhost

Since Boost 6.x.1.20 (todo: check for 7.x-1.x), part of the htaccess code was moved to cache/.htaccess

For example:

AddDefaultCharset utf-8
<FilesMatch "\.((html)|((html)\.gz))$">
  <IfModule mod_expires.c>
    ExpiresDefault A1
  </IfModule>
  <IfModule mod_headers.c>
    Header set Expires "Sun, 19 Nov 1978 05:00:00 GMT"
    Header set Cache-Control "no-store, no-cache, must-revalidate, post-check=0, pre-check=0"
  </IfModule>
</FilesMatch>
<IfModule mod_mime.c>
  AddCharset utf-8 .html
  AddCharset utf-8 .css
  AddCharset utf-8 .js
  AddEncoding gzip .gz
</IfModule>
<FilesMatch "\.(html|html\.gz)$">
  ForceType text/html
</FilesMatch>
<FilesMatch "\.(js|js\.gz)$">
  ForceType text/javascript
</FilesMatch>
<FilesMatch "\.(css|css\.gz)$">
  ForceType text/css
</FilesMatch>

SetHandler Drupal_Security_Do_Not_Remove_See_SA_2006_006
Options None
Options +FollowSymLinks