Add support for NetBSD
Merge branch 'master' into netbsd
Remove space
Change requirements order
Write error on set checksum verification failure. Retirve major version number more reliably
Merge branch 'master' into netbsd
Remove custom_before/after as unnecessary (hurried adding them)
Small refactorings
Introduce _system_version_full for NetBSD
Merge pull request #2201 from Ch00k/netbsd

Initial support for NetBSD