[PATCH 1/3] pwclient: handle missing ~/.pwclientrc better

[Finucane, Stephen]

> From: Mike Frysinger <vapier at chromium.org>
> 
> The upgrade path will crash if ~/.pwclientrc doesn't exist, so add an
> explicit check for the file before we try to "upgrade" it.
> 
> The default error messages don't mention the config file, so it can be
> a bit confusing what pwclient is complaining about when running.
> 
> Signed-off-by: Mike Frysinger <vapier at chromium.org>

LGTM

Reviewed-by: Stephen Finucane <stephen.finucane at hotmail.com>