https://www.ivankrizsan.se/2014/07/17/upgrading-apache-http-server-2-2-to-2-4-on-ubuntu-12-04/
service apache2 stop
rm -r /etc/apache2/
apt-get remove apache2
apt-get remove apache2*
apt-get purge apache2 apache2-utils apache2.2-bin apache2-common
apt-get autoremove
add-apt-repository ppa:ondrej/apach2
apt-get update
apt-get upgrade
apt-get install apache2
