The problem with the Sleepycat license is that its not one, but three licenses.
Dear legal eagles :
I think that the text for the Sleepycat license  is not correct.
The text is rather historical version of the BerkeleyDB aggregated
licensing (which is now AGPL-licensed FWIW) with three licenses :
- Sleepycat proper, and
- Two "BSD-3-Clause" licenses.
I suggest to trim the Sleepycat text to Sleepycat proper only. When
the three licenses are found, a proper license expression can be used
Alternatively another "Spleepycat-only" kind of license could be
created just for the Sleepycat text proper.