Allow TLZ_ORIGIN to accept multiple origins separated by commas for more
flexible CORS configuration. Whitespace around each origin is trimmed and
empty values are filtered out.
Example: TLZ_ORIGIN="http://localhost:3000,http://example.com:8080"
Co-authored-by: Dulanic <Dulanic@users.noreply.github.com>
Co-authored-by: Matt Holt <mholt@users.noreply.github.com>
