devel/py-sysctl: update to 0.1b6

- Update to 0.1b6

(cherry picked from commit 101b7847b83acf17afca68d2b7acf531df34f78f)
devel/py-sysctl: update to 0.1b7

- Update to 0.1b7
- Use auto plist

(cherry picked from commit 4062d2bf3abac82bf9c3e5b685e8ebe385d2b9f0)