Add missing encoding directive in POD (#592)

lemonldap-ng-manager/lib/Lemonldap/NG/Manager/Notifications.pm

@@ -620,6 +620,8 @@ sub _stToStr {
 1;
 __END__
 
+=encoding utf8
+
 =head1 NAME
 
 Lemonldap::NG::Manager::Notifications - Perl extension to manage Lemonldap::NG

lemonldap-ng-manager/lib/Lemonldap/NG/Manager/Sessions.pm

@@ -858,6 +858,8 @@ sub _stToStr {
 1;
 __END__
 
+=encoding utf8
+
 =head1 NAME
 
 Lemonldap::NG::Manager::Sessions - Perl extension to manage Lemonldap::NG

lemonldap-ng-portal/lib/Lemonldap/NG/Portal/OpenID/Server.pm

@@ -218,6 +218,8 @@ sub _mode_checkid {
 1;
 __END__
 
+=encoding utf8
+
 =head1 NAME
 
 Lemonldap::NG::Portal::OpenID::Server - Add capability to manage extensions to