This is an incremental update and should be much easier to handle than
the transition from 4.6.5 to 4.7.2 in the ports tree.
The official release notes can be found at
http://www.kde.org/announcements/announce-4.7.3.php.
Approved by: avilla (mentor), makc (mentor), portmgr (miwi)
Feature safe: yes
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