The patch for the zziplib package applied for version 0.13.69 and
earlier includes a reference to Creative Commons
Attribution-NonCommercial-ShareAlike 2.0 Generic license, which
causes Flexera's ~expensive perl script~ FlexNet Code Insights open
source license and compliance tool to flag Spack as a non-commercial
product. This patch narrows the diff context in the patch to exclude
this text. The semantics of the patch file are unchanged.