Incorrect documentation note for $Archive::Tar::WARN

[drgrice1]

The documentation on $Archive::Tar::WARN states that setting this variable to 0 is not threadsafe. That is not really accurate. It is threadsafe to set that variable to 0 as doing so only turns of a carp call. What is not threadsafe is to set this variable to 0, and then use the $Archive::Tar::error variable. However, it is threadsafe to set $Archive::Tar::WARN to 0 and use the $tar->error method to obtain error messages.

I know this is just quibbling on details, but if you want to catch warnings in a threadsafe manner, and don't want warnings handled by the current $SIG{__WARN__} handler, then setting this variable to 0 and using $tar->error is a threadsafe way to do so, and the documentation is misleading on this.