v2021-security: Import Debian changes 241-7~deb10u5 from debian/buster-security

systemd (241-7~deb10u5) buster; urgency=medium

• basic/cap-list: parse/print numerical capabilities (Closes: #964926)
• missing: add new Linux capabilities. Linux kernel v5.8 adds two new capabilities. Make sure we can recognize them even when built with an older kernel.
• networkd: do not generate MAC for bridge device (Closes: #963488)