Before, some places didn't document the short options (-? and -V),
some documented both, some documented nothing, and they were listed in
various orders. Now this is hopefully more consistent and complete.
In dry-run mode, just the name of the file to be removed is printed to
stdout; this is so the user can easily plug it into another program
through a pipe. If debug mode is also specified, a more verbose message
is printed to stderr.
Author: Gabriele Bartolini
Reviewer: Josh Kupershmidt
For consistency with other tools, put the options before further usage
information.
In pg_standby, remove the supposedly deprecated -l option from the
given example invocation.
