Update to upstream version 2.3.4

Details:

• Fix issue where LDAP login with empty passwort was possible, see https://github.com/pdav/netmagis/issues/173
• Fix LICENSE*
• Pet portlint

PR: 226437
Submitted by: dgeo@centrale-marseille.fr
Approved by: pdagog@gmail.com (maintainer)
MFH: 2018Q1