the text of email notifications should be linkified using the configured linkers.

Generated from https://support.atlassian.com/browse/FSH-1108. Some customers would find it useful to customise comments (such as using regex substitutions) before they are sent to the user.

For example to do something like Linkers in fisheye, attach links to certain codes.

However currently the comments are formatted by our class CheckinCommentFormatter which is not customisable by our customers.