[long_options]: Add an entry for --remove-destination.
(usage): Describe --remove-destination.
(do_copy): Use unlink_dest_after_failed_open member, not `force.'
(cp_option_init): Initialize new members.
(main): Handle UNLINK_DEST_BEFORE_OPENING (aka --remove-destination).
(usage): Describe -L and -H.
(cp_option_init): Initialize to DEREF_UNDEFINED, not `1'.
(main): Add `H' and `-L' to getopt spec string.
[case 'a']: Initialize `dereference' to DEREF_NEVER, not 0.
[case 'd']: Likewise.
[case 'H']: New case.
[case 'L']: New case.
[case 'R']: Don't set dereference to `0' here.
If it's not yet defined, set x.dereference to DEREF_NEVER
if -R was specified, else set it to DEREF_ALWAYS.
Set x.xstat accordingly for -H.
(long_opts): Update "parents" and deprecated "path" entries to use
`PARENTS_OPTION', not `P'.
(usage): Update --help output.
(main): Warn that the meaning of `-P' will soon change.
(enum) [STRIP_TRAILING_SLASHES_OPTION]: New member.
(remove_trailing_slashes): New global.
(long_opts): New getopt spec.
(usage): Describe.
(do_copy): Strip trailing slashes on SOURCE names only if the new
option has been specified.
(main): New case.
(TARGET_DIRECTORY_OPTION): Define.
(SPARSE_OPTION): Define.
(usage): Describe it.
(do_copy): Change meanings/names of first two parameters: use `n_files'
in place of `argc - optind', and `file' instead of `argv + optind'.
Add parameter, target_directory.
(main): Pass new arg, target_directory.
Deprecate --version-control (-V) in comments.
(usage): Remove mention of --version-control.
(main): Make -V warn then fall through into --backup case.
[--backup case]: Handle optional arg.
Include version-etc.h instead.
(PROGRAM_NAME, AUTHORS): Define.
[long_options]: Add entries for --help and --version.
Remove parse_long_options call.
(main) [getopt switch]: Add a case for each of --help and --version.
[long_options]: Remove the "help" and "version" entries.
(main): Use parse_long_options, including author name(s).
Remove the show_version and show_help blocks.
