Subject: Anonymous commit (empty Author and Committer)

From: Andrei Borzenkov <[email-masked]>
Date: Fri, 30 Oct 2015 17:26:00 +0300

See 
http://git.savannah.gnu.org/cgit/grub.git/commit/?id=206676601eb853fc319df14cd3398fbdfde665ac

I was not even aware that this is possible. Is there anything on server 
side that can prevent it?

Would be good if commit were amended and force pushed to fix it.