gerrit's mail when adding a reviewer

[Stephan Bergmann]

Just noticed that when I add a reviewer to somebody else's change, 
gerrit sends a mail taking on my identity ("Stephan Bergmann (via Code 
Review) <gerrit at gerrit.libreoffice.org>") claiming "I have submitted a 
patch for review."  But I did not submit anything for review, I merely 
invited somebody else to also review something.  I find that confusing 
at least.

Stephan