.htaccess

<IfModule mod_headers.c>
    Header set Access-Control-Allow-Origin "*"
    Header unset ETag
</IfModule>
FileETag None

<IfModule mod_expires.c>
    ExpiresActive On
    ExpiresDefault "access plus 2 months"
</IfModule>

RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

RewriteCond %{DOCUMENT_ROOT}%{REQUEST_URI} !-f
RewriteCond %{DOCUMENT_ROOT}%{REQUEST_URI} !-d
RewriteRule ^/?wiki(/.*)?$ %{DOCUMENT_ROOT}/wiki/index.php [L]

#remove php file extension-e.g. https://example.com/file.php will become https://example.com/file
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.php -f
RewriteRule ^(.*)$ $1.php [NC,L]

RedirectPermanent /download.php /downloads
RedirectPermanent /download /downloads

ErrorDocument 404 /404.php

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /404.php [L]