How to build LemonLDAP::NG for RedHat/CentOS

- Install rpm-build package
- Install all perl dependencies
- Put lemonldap-ng.spec in /usr/src/redhat/SPECS
- Put LemonLDAP::NG tarball in /usr/src/redhat/SOURCES
- Go to /usr/src/redhat
- Do rpmbuild -ba SPECS/lemonldap-ng.spec