Comment 1 for bug 2063350

Here's a branch that adds a --check-leader flag to marc_export: https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/jboyer/lp2063350_lead_on / working/user/jboyer/lp2063350_lead_on

When enabled what it will do is discard anything over 24 characters or pad it up to 24 using a template that tries not to be entirely spaces or zeros, and also log a warning that its making a change.