Update old licenses to show they are superseded by 3.01

A few days ago, an email sent to the php.general mailing list pointed
out that the PHP License, version 3.01 is not listed on the

Update old licenses to show they are superseded by 3.01

A few days ago, an email sent to the php.general mailing list pointed
out that the PHP License, version 3.01 is not listed on the Open Source
Initiative list of approved licenses, while the older 3.0 version is
listed[1].

I volunteered[2] to discuss this with the OSI to see what steps we need
to take to get the 3.01 version of the license listed. I followed their
procedures to submit a request for "legacy approval" of the 3.01
license, since it's been in use for over 14 years[3].

After some discussion[4], we were advised to explicitly note the older
version as being deprecated and superceded by the 3.01 version[5].

This pull request updates our past licenses, similar to how Apache
presents their old licenses[6], to note that:

1. The 3.0 license is an OSI approved license, but the 3.01 version
supercedes this license.
2. The 2.02 and 2.01 licenses are listed for historical purposes
and are superseded by the 3.01 license.

[1]: https://news-web.php.net/php.general/327010
[2]: https://news-web.php.net/php.internals/108846
[3]: http://lists.opensource.org/pipermail/license-review_lists.opensource.org/2020-March/004716.html
[4]: http://lists.opensource.org/pipermail/license-review_lists.opensource.org/2020-March/thread.html
[5]: http://lists.opensource.org/pipermail/license-review_lists.opensource.org/2020-March/004741.html
[6]: https://www.apache.org/licenses/LICENSE-1.0

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Trim trailing whitespace

This patch cleans all redundant trailing whitespace across the
repository except for the icalendar files.

updating license so it's up to date...

Update license stuff