cli: add a column SINCE in the list command
cli: add a column SINCE in the list command

Before, "since" was part of the state column.

Myself5/mirrorbits,wsnipex/mirrorbits,kib/mirrorbits,kib/mirrorbits,etix/mirrorbits,wsnipex/mirrorbits,Myself5/mirrorbits,etix/mirrorbits,etix/mirrorbits,wsnipex/mirrorbits,kib/mirrorbits,Myself5/mirrorbits