Use SPDX license identifiers

[ypid]

Ref: https://github.com/ansible/galaxy-issues/issues/169 (not yet approved)

I am already doing this, ref:

• https://github.com/debops/ansible-cryptsetup/blob/master/meta/main.yml
• https://github.com/debops/ansible-apt_cacher_ng/blob/master/meta/main.yml

And Galaxy does not have any problem with it.

[drybjed]

Sounds good. :+1: I'll start to update it in the roles I'm woking on.

[ypid]

We are doing that now extensively ;-) Closing so that this repo can be archived eventually.