This commit is a rough port to Django 2.1, Python 3 and a Docker based local
development setup. Tests fail/error but migrations and the web frontend are
already runnable. Task queue functionality is untested and translations seem to
have trouble.
- make sure that AddSshPublicKeyForm does not try to parse the key if it is
None
- split the key text into a maximum of 3 parts to allow whitespace in comments
- update changelog
- add sshkeys to hostingpackage detail view context
- implement new osusers.forms.EditSshPublicKeyCommentForm
- implement new views ListSshPublicKeys, DeleteSshPublicKey and
EditSshPublicKeyComment
- add new URL patterns 'list_ssh_keys', 'edit_ssh_key_comment' and
'delete_ssh_key'
- link from hosting package detail view to 'list_ssh_keys' when there are
SSH keys assigned to the shown hosting package
- add new templates osusers/sshpublickey_list.html,
osusers/sshpublickey_confirm_delete.html and
osusers/sshpublickey_edit_comment
- add operating system user output to template
osusers/sshpublickey_create.html
- add changelog entry
- implement new form osusers.forms.AddSshPublicKeyForm
- move message texts from osusers.admin to osusers.forms
- add new view osusers.views.AddSshPublicKey
- add new URL patter 'add_ssh_key' to osusers.urls
- add new template osusers/sshpublickey_create.html
- link from hosting package detail template to 'add_ssh_key'
- add changelog entry for new feature
