Get ready for next version

Signed-off-by: Victor Berger <victor.berger@m4x.org>
Fix archive events.
Merge branch 'xorg/maint'
Fix organizer display for events created by xnet accounts.
Merge branch 'xorg/maint'
Fix owner deletion on MLs.
Merge branch 'xorg/maint'
Merge branch 'xorg/maint' into xorg/master
NL bounces: add two new failures hints which appearead in April bounces
Change sorting order on ML display to use sort_name.
admin/emails/broken: Sort lines of the produced CSV

Sort these lines by (promo, sortname) instead of email address.
admin/emails/broken: remove trailing spaces after email addresses

This prevents \r to appear in the CSV file
admin/emails/broken: name the downloaded file "broken.csv"
update core

Add sort_name to pluser.
Fix profile view when not logged in.
Handles canceled payment transactions.
Remove non-working options from xnet mail page.
Cannot choose @melix.org as bestalias.
Change École polytechnique favicon.
Use mysqli for LOAD DATA LOCAL INFILE.