`false': Do nothing, unsuccessfully
===================================
`false' does nothing except return an exit status of 1, meaning
"failure". It can be used as a place holder in shell scripts where an
unsuccessful command is needed.
By default, `false' honors the `--help' and `--version' options.
However, that is contrary to POSIX, so when the environment variable
`POSIXLY_CORRECT' is set, `false' ignores _all_ command line arguments,
including `--help' and `--version'.
This version of `false' is implemented as a C program, and is thus
more secure and faster than a shell script implementation, and may
safely be used as a dummy shell for the purpose of disabling accounts.