(NFC) (dev/core#878) Simplify standard header. Remove year+version.

[totten]

Overview

This implements https://lab.civicrm.org/dev/core/issues/878 and aims to reduce git-noise.

Before

• The standard header used on most files includes a copyright declaration - along with a version number, range of years, summary of the license terms, and link for details. The headers periodically require a trivial update when a new year comes.

After

• The standard header used on most files includes a copyright declaration - along with a very brief license summary and link for details. The headers no longer require a trivial update when a new year comes.

Comments

As you can see in 878, the comparable headers among other reputable projects are varied. They (almost always?) include the copyright declaration and some reference to the license terms; but they differ on whether to include specific version numbers and years in the declaration. However, this means that there are good precendents (such as Google's Angular and Facebook's React) which use a convention similar to this updated one.

This PR only changes files which already use the standard header (modulo trivial formatting). The bulk of the switch was performed with https://gist.github.com/totten/85d368a512f7dcda9319dfb57a0f8ecf, though a handful of files (which had trivial formatting differences) were manually tweaked.

[civibot]

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[xurizaemon]

-47K LoC 👍

Please report back on bandwidth savings from CiviCRM.org/download

[jusfreeman]

I approve this change 👍

[christianwach]

-47K LoC 👍

gasps and smiles

Fantastic!