Relax LICENSE copyright requirement for executable packers use cases?

**Is your feature request related to a problem? Please describe.**
Executable packers like UPX can't use ZSTD due to the copyright requirements of the LICENSE, specifically this clause:

> * Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.

**Describe the solution you'd like**
Relax the requirement for this specific use case only, as this prevents using ZSTD in binary packers since there is nowhere for them to enforce copyright into the target binary, and requires redustributing as part of the decompression of the executable.

**Describe alternatives you've considered**
N/A

**Additional context**
Request for this support has been around for 7 years and is blocked by this, see https://github.com/upx/upx/issues/295