Update to "disallowed minor code changes"
Update to "disallowed minor code changes"

Added section about minor typos in comments being disallowed,
following the discussion at the Glance meeting on 3 November.

Change-Id: Ic6c6369895a7095c01c1810358f4355c5cc8f0fa

rajalokan/glance,openstack/glance,openstack/glance,openstack/glance,rajalokan/glance