fromupstream: add patchwork project support

There are other patchwork servers besides patchwork.kernel.org. Support
a syntax of pw://PROJECT/ID for this, and retrieve the URL from
~/.pwclientrc.

BUG=none
TEST=fromupstream with pw://ID and pw://PROJECT/ID

Change-Id: Iaa1d72fc039a70db339fbc75fc9261eda4a9e643
Signed-off-by: Brian Norris <[email protected]>
Reviewed-on: https://chromium-review.googlesource.com/1062191
Reviewed-by: Douglas Anderson <[email protected]>
1 file changed