ksmserver: help users with intentionally read-only homedirs self-satisfy
As part of its sanity check, ksmserver doesn't start Plasma if $HOME
is read-only unless KDE_HOME_READONLY=1
is set in the environment. But
this is never told to the user, so an advanced user or system
administrator who has intentionally set up the system this way won't
know what to do about it and will submit a bug report to KDE.
To resolve this, inform such users about the relevant environment variable in the error message, without giving specific details about how to set it. Advanced users will already know how to do this and thus self-satisfy.
BUG: 463352 FIXED-IN: 6.0