macports base support: add license data for new licensecheck target; update bash completions

[mascguy]

Description

This work supports pending macports-base PR 240 - add licensecheck target, copied from macports-infrastructure; updated work from defunct PR #211.

NOTE: This PR should NOT be merged until the aforementioned PR is both merged into master, and available via a new MacPorts release!

Type(s)

• bugfix
• enhancement
• security fix

Tested on

macOS x.y
Xcode x.y

Verification

Have you

• followed our Commit Message Guidelines?
• squashed and minimized your commits?
• checked that there aren't other open pull requests for the same change?
• referenced existing tickets on Trac with full URL?

[macportsbot]

Notifying maintainers:
@raimue for port bash-completion.

[reneeotten]

@mascguy is there any progress on this PR and/or the one in base and #11184? It is has been open for more than a year without activity so they are on the listed to be closed if there is no foreseeable progress.

[mascguy]

@mascguy is there any progress on this PR and/or the one in base and #11184? It is has been open for more than a year without activity so they are on the listed to be closed if there is no foreseeable progress.

While it hasn't been forgotten, it's low on the priority list.

Please keep both open, as they will be addressed eventually.