I have now run across the license below several times.
It is not on the SPDX list.
It is used frequently in the wild. (search string "the author is not responsible for the consequences of use of this software, no matter how awful, even if they arise from defects in it".
Has there been any previous action to identify or add this license?
Copyright (c) xxx by xxx.
Written by xxx. Not derived from licensed software.
Permission is granted to anyone to use this software for any
purpose on any computer system, and to redistribute it in any way,
subject to the following restrictions:
1. The author is not responsible for the consequences of use of
this software, no matter how awful, even if they arise
from defects in it.
2. The origin of this software must not be misrepresented, either
by explicit claim or by omission.
3. Altered versions must be plainly marked as such, and must not
be misrepresented (by explicit claim or omission) as being
the original software.
4. This notice must not be removed or altered.
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