Allow the PSFL in non-GPL licenses.

Author: Julian

tox.ini

@@ -31,7 +31,7 @@ commands =
     formatnongpl: {envpython} -m pip install --quiet '{toxinidir}[format-nongpl]'
 
     audit: {envpython} -m pip_audit
-    audit-formatnongpl: {envpython} -m piplicenses {posargs} --ignore-packages pip-requirements-parser pip_audit pip-api --allow-only="Apache Software License;ISC License (ISCL);MIT License;BSD License;Mozilla Public License 2.0 (MPL 2.0)"
+    audit-formatnongpl: {envpython} -m piplicenses {posargs} --ignore-packages pip-requirements-parser pip_audit pip-api --allow-only="Apache Software License;ISC License (ISCL);MIT License;BSD License;Mozilla Public License 2.0 (MPL 2.0);Python Software Foundation License"
 
     build: {envpython} -m build {toxinidir} --outdir {envtmpdir}/dist