Error in extract_lang with a value with *
See mails from Frédéric Piégé and @kwenteen : http://mail.ow2.org/wws/arc/lemonldap-ng-users/2015-08/
We have this error if Accept-Language contains a *:
Quantifier follows nothing in regex; marked by <-- HERE in m/* <-- HERE / at /usr/share/perl5/Lemonldap/NG/Common/CGI.pm line 371.