tzsetup: allow choice of copy or symlink for /etc/localtime

[emaste]

Summary

Ref twitter thread at https://twitter.com/kaevans91/status/1580652408861958144

[bapt]

I don't think we should offer the choice, we should only default on the sane approach which is the symlink. people should be able to cp by themselves if they are in a corner case.

[emaste]

D37005 to remove copy mode

[gjb]

In D37004#840306, @bapt wrote:

I don't think we should offer the choice, we should only default on the sane approach which is the symlink. people should be able to cp by themselves if they are in a corner case.

I am inclined to agree.

[philip]

No need for the choice.

[emaste]

D37005 committed