Update perldelta with suggestions from porters

Co-authored-by: Richard Leach <[email protected]>
Co-authored-by: Karl Williamson <[email protected]>
Co-authored-by: Leon Timmermans <[email protected]>
Co-authored-by: Philippe Bruhat (BooK) <[email protected]>
Co-authored-by: mauke <[email protected]>
Co-authored-by: Karen Etheridge <[email protected]>
Co-authored-by: Tony Cook <[email protected]>

Author: 8 people