Update licence classifier for pypi

Author: remip2

setup.py

@@ -39,7 +39,7 @@
     classifiers=[
         "Programming Language :: Python :: 2",
         "Programming Language :: Python :: 3",
-        "License :: Apache License 2.0",
+        "License :: OSI Approved :: Apache Software License",
         "Operating System :: OS Independent",
         "Topic :: System :: Networking",
         "Environment :: Console"