I put this in ../A, and then did:
for i in `ls /usr/pkgsrc/licenses`; do wdiff -3 /usr/pkgsrc/licenses/$i ../A >
$i; done
and then ls -lS, which showed postgresql-license to be closest, and the
diff follows. The wording is slightly different, but 'any new file
that contains substantial portion of this file' is ordinarily viewed
as a copy (or derivative work). So this just barely meets my comfort
level for not objecting to you calling it the same.
Further, it seems odd that postgresql-license has a -license suffix,
since it's obviously intended to be a free license and is OSI approved:
http://opensource.org/licenses/PostgreSQL
Here's the wdiff output from postgresl-license to what you posted:
======================================================================
[-The PostgreSQL Licence (TPL)
Copyright (c) <year>, <organization>-]
======================================================================
[-copies.-]
{+copies or in any new file that contains a substantial portion of this
file.+}
======================================================================
[-<organization>-] {+THE AUTHOR+}
======================================================================
[-<organization>-] {+THE AUTHOR+}
======================================================================
[-<organization>-]
{+THE AUTHOR+}
======================================================================
[-<organization>-] {+THE AUTHOR+}
======================================================================
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