[PATCH v2 2/4] pwclient: require one or more of pwclient -{a,s}

[Finucane, Stephen]

> > Previously, we required the -s flag for 'pwclient update'. But since we
> > allow updating up to 2 different fields ('archived' and 'state'), drop
> > the required flag, and just enforce that the user must provide -a, -s,
> > or both.
> >
> > Signed-off-by: Brian Norris <computersforpeace at gmail.com>

Merged.