Transform some of them into copyright lines.
Also fix three header lines and snip some trailing whitespace.
Signed-off-by: Benno Schulenberg <bensberg@justemail.net>
Use dates without the day, use the full month name, put "util-linux" in
the lower left corner, and "User Commands" or "System Administration"
at the top center.
Also improve here and there the one-line program description.
Signed-off-by: Benno Schulenberg <bensberg@justemail.net>