Old config:
<VirtualHost *:80>
   ServerName localserver
   DocumentRoot /home/chris/web/public_html
   <Directory /home/chris/web/public_html>
       Options +FollowSymLinks
       AllowOverride All
       Order allow,deny
       allow from all
   </Directory>
</VirtualHost>
New config:
<VirtualHost *:80>
   ServerName localserver
   DocumentRoot /home/chris/web/public_html
   <Directory /home/chris/web/public_html>
       Options +FollowSymLinks
       AllowOverride All
       Require all granted
   </Directory>
</VirtualHost>
More info: