htaccess auto redirect to SSL connection

gistfile1.txt

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /

#RewriteCond %{SERVER_PORT} 80
#RewriteRule ^(.*)$ https://domain.com/$1 [R,L]

RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType text/css "access plus 5 minutes"
</IfModule>