Update Apache configuration for Apache 2.4
Rename _3.4.3 script back to _3.4.0.

The last change to the database was done in version 3.4.0 so this
is the version this script upgrades you to. See the mailinglist
discussion for details:
https://www.a-eskwadraat.nl/archive/domjudge-devel/2014-May/thread.html
ChangeLog
release 3.4.4