RFC: Pass TRIM through GELI

[Matthew D. Fuller]

> I've done a quick implementation of TRIM passthru support for GELI.

After last round, everybody seems happy enough with this, so I've
filed it as
<https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=198863>.


-- 
Matthew Fuller     (MF4839)   |  fullermd at over-yonder.net
Systems/Network Administrator |  http://www.over-yonder.net/~fullermd/
           On the Internet, nobody can hear you scream.