Allow the max diff size to be customized.

Review Request #3134 — Created June 2, 2012 and submitted — Latest diff uploaded

Information

Review Board
release-1.6.x

Reviewers

Allow the max diff size to be customized.

Some users weren't thrilled by the 1MB limit for diffs. This change
makes this customizable, and defaults to unlimited diff sizes.
Administrators can change this to any size they like in order to reduce
load on the server.
Tested saving the setting.

Unit tests all pass.