_deleteSessionFromLocalStorage should exit directly if no $id given
Else we have something like that in log: {panel} [Thu Feb 02 12:25:13 2012] [debug] CGI.pm(100): Lemonldap::NG::Portal::SharedConf: processing to sub authenticate [Thu Feb 02 12:25:13 2012] [debug] CGI.pm(100): Lemonldap::NG::Portal::SharedConf: Current login saved into failedLogin [Thu Feb 02 12:25:13 2012] [debug] CGI.pm(100): Lemonldap::NG::Portal::SharedConf: Module Cache::FileCache loaded Use of uninitialized value $id in concatenation (.) or string at /usr/local/share/perl/5.10.1/Lemonldap/NG/Portal/Simple.pm line 1348. [Thu Feb 02 12:25:13 2012] [debug] CGI.pm(99): /usr/local/share/perl/5.10.1/Lemonldap/NG/Portal/Simple.pm 1348: [Thu Feb 02 12:25:13 2012] [warn] Unable to remove session from local storage [Thu Feb 02 12:25:13 2012] [debug] CGI.pm(100): Lemonldap::NG::Portal::SharedConf: Update persistent session key loginHistory with HASH(0xb894a2e0) {panel}