garethr/garethr-docker — pull request #86 by RsrchBoy (2014-08-26 17:26:52+00:00)
Title: Allow upstream apt source pin priority to be changed, or eliminated

Apt pins are... Interesting. The hardcoded "10" was sufficient to keep my
system from allowing me to update lxc-docker via the expected means.

This changeset allows one to override the default pin priority level via
```apt_source_pin_level```, or even disable it completely via
```pin_upstream_package_source```.