Update disclaimer/LICENSE to reflect conda-build originally being part of conda

[kenodegard]

Description

We were reminded (#4568 (comment)) that conda-build's code was originally part of conda and only later (~2014) was it moved into a separate repo.

This change uses standard SPDX syntax for disclaimers (I opted to use ©, if there are any objections or concerns I'll switch it back to Copyright (c)), credits Continuum Analytics with the original copyright, and recognizes the rename to Anaconda in 2017.

Sought to otherwise standardize the disclaimer and LICENSE.txt to mirror that of conda (conda/conda#12183).

Ref https://matija.suklje.name/how-and-why-to-properly-write-copyright-statements-in-your-code

Checklist - did you ...

• Add a file to the news directory (using the template) for the next release's release notes?
• Add / update necessary tests?
• Add / update outdated documentation?

[mbargull]

Let's not overcomplicate things and go with

Suggested change

	SPDX-FileCopyrightText: © 2012 Continuum Analytics, Inc. <http://continuum.io>
	SPDX-FileCopyrightText: © 2017 Anaconda, Inc. <https://www.anaconda.com>
	SPDX-FileCopyrightText: © 2012 Anaconda, Inc. <https://www.anaconda.com>

The copyright remained with the same entity (CIK: 0001538860), after all.
Let's just us the current name.

[mbargull]

Suggested change

	SPDX-FileCopyrightText: © 2012 Continuum Analytics, Inc. <http://continuum.io>
	SPDX-FileCopyrightText: © 2017 Anaconda, Inc. <https://www.anaconda.com>
	SPDX-FileCopyrightText: © Anaconda, Inc. <https://www.anaconda.com>

[jezdez]

Hmm, I wonder if https://hynek.me/til/copyright-years/ might be worth another look, a lot of corporate project have removed the years altogether!

[mbargull]

Hmm, I wonder if https://hynek.me/til/copyright-years/ might be worth another look, a lot of corporate project have removed the years altogether!

Ah, nice find! It's good to see that this is has some notable examples. That'd be my favored solution because it's more faithful, #4568 (comment) :

However, a lot of the code/source files are from 2016+, i.e., (c) 2012/(c) 2014 is not representative/true for that.

Going with SPDX-FileCopyrightText: © Anaconda, Inc. <https://www.anaconda.com> in the file headers and either leaving LICENSE.txt untouched or just substituting Continuum -> Anaconda sounds reasonable.
(Though, I'd leave 2012 in LICENSE.txt -- doesn't really hurt at that single place, plus it is a faithful statement in there.)

[varlackc]

This pull request has been open for a long time, just curious if we should close it.

[jezdez]

No, this was blocked by the legal work being done in providing a trademark license to NumFOCUS and can now picked up again.

[github-actions]

Hi there, thank you for your contribution!

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed automatically if no further activity occurs.

If you would like this pull request to remain open please:

1. Rebase and verify the changes still work
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Thanks!