Add support to s3 sync for symlinks as website redirects

With the addition of website redirects several years ago, is there any reason not to support syncing symlinked files as a redirect? Symlink directories could also be supported via managing the bucket redirection rules.

Relatedly, the "--website-redirect (string)" option is listed as part of the help output for the sync command, but a single string makes no sense for an operation that can work on an arbitrary number of files. If what I'm looking for is supported via this option somehow, some usage examples are needed.