Add support for Splat as a bug tracker

Review Request #8343 — Created Aug. 23, 2016 and submitted — Latest diff uploaded

Information

Review Board
release-3.0.x
3239bfc...

Reviewers

The patch adds support for using Splat as a bug tracker for a
repository. As Splat is a SaaS, only the https://hellosplat.com instance
is supported.

Added Splat as a bug tracker and saw the correct information in the bug
infobox. The bug URL view redirected to the correct place.