Update logrotate's config

cherry-pick of 4796b043c1f3f4582e2d78824a857d20ab8c529e plus changed the
default installation path to /var/www/mconf-web/, refs #375
Organize the webserver config files

cherry-pick c62ac960db8ce185a8323a3fb40b69cbe6166c84
Update locales after 8ae42eb92eb
Room names are now user's logins and space's permalinks to be unique

Using user's and space's names was causing some rooms to have duplicated names.

cherry-pick fa48ee9ecdc517441564b1f5bfbf4a8878b31388, with several
adaptations to the new branch and more tests.