Remove Steam/SteamOS references from things like headers,
journal error messages, etc.
While at it, also improve wording in some points.
Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
Drop "steamos" references as well as "submit/submitter" wording
given that we are decoupling the submission mechanism of the
logs' collection.
Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
