Replace bugzilla.xfce.org links for gitlab.xfce.org
I'm a attaching a simple patch that find/replaces links. List of affected files:
./index.php
./pages/community/nav.php
./pages/getinvolved/index.php
./pages/getinvolved/nav.php
./pages/header.php
./pages/news-array.php
I don't know if translation files should also be updated or only the ./lib/tools/updatepot.sh
script.