capabilities module of ansible 2.5.1 is broken on targets with libpcap >= 2.41

[Ángel]

Ansible 2.5.1+dfsg-1 as shipped in bionic has a capabilities module which is broken on targets with libpcap >= 2.41

Upstream bugs:
https://github.com/ansible-collections/community.general/issues/993
https://github.com/ansible/ansible/issues/72662

https://github.com/ansible-collections/community.general/commit/07d123a71a5ad769aac4d04e7e189fbf5f957cd8

The easiest fix would simply to replace the bundled capabilities.py with the latest from upstream:
https://github.com/ansible-collections/community.general/blob/main/plugins/modules/system/capabilities.py
(the only other two commits it received are not substantial, they remove ANSIBLE_METADATA and add a FQDN to the EXAMPLES entry)