post-deinstall:
- Removing user/group is not a good idea. You can't know if the consul
user/group has been created by the package or not; user can use it even
for something else.
pre-deinstall:
- User should decide h[ei]mself if (s)he wants to stop the service
before uninstalling, it's his/her responsibility and it should not
be handled automagically in pre-deinstall hook.
- `&>` is not POSIX-sh compatible, it's a bashism.
Following rules have been applied:
- script starts with shebang !#/bin/sh followed by blank line,
- script ends with exit 0 prepended by blank line,
- only stderr of adduser, addgroup or passwd is redirected to /dev/null,
- getent passwd/group instances has been removed,
- manual checking of file and group existence has been removed,
- `|| true` instances has been removed.
Comments and line wrapping have been preserved.
