Ansible 2.8 minimum, fix OpenBSD regression

Ansible 2.8 minimum (#121,#122,#124,#129) Thanks to @Spreadcat and @ahmadalli
Fix for OpenBSD issue (#115) Thanks @thalunil

Focal support, CI updates, Code quality improvements

#127

• Ubuntu focal support
• CI updates (to focal)
• Code quality improvements, add pre-commit to call yaml lint and ansible-lint as Galaxy does.

Add new options from OpenSSH 8.3p1

#126

Thanks @Jakuje

Revert end_host change

end_host doesn't work in Ansible 2.7, which is still likely in wide use. Reverting for now until a better solution is found. #122 #123 opened to track the problem.

Gentoo, end_host

• Add Gentoo defaults #120 . Thanks to @oddlama
  * call end_host for unsupported hosts #121. Cheers to @Spreadcat

Cento 8, Debian 10, Suse 15

#97 Add Centos 8 and Suse 15 support
#117 Add Debian 10 support

Update syntax, AIX support, duplicate Gateway Port removal

#92 Potentially a breaking change, this release changes syntax to more recent Ansible standards. Thanks to @nkakouros

#112 Add support for AIX. Thanks you @d-little

Fixes duplication of GatewayPorts in the sshd_config.j2 template, closing #108 (reported by @Gwynnbleid1)

v0.7.6: Merge pull request #110 from willshersystems/travis_fixes

Fixes #102 lint errors thanks to @yurihs

Also fixed issues with the Travis tests using --sudo rather than --become.

Fedora PrivilegeSeperation removal and implement backups

#106 and #107 merged.

• Implement sshd_backup option.
• Remove PrivilegeSeperation option from Fedora template as it's no longer used

Thanks to @BenGig and @kpfleming

Fix variable loading

Merge #104 - fix for variable file load order. Thanks to @pillarsdotnet .