Can Varnish Set Cookies?

[Travis Crowder]

Sorry if this is on the ineternet somewhere, but I have yet to find it.

Can Varnish set a cookie?

In example, if a user on a mobile device goes to xyz.com, Varnish sees a 
mobile user agent and redirects them to m.xyz.com via the vcl_error 
section.  Before or after the redirect, can Varnish set a cookie without 
the application doing so?

Thanks,
Travis