I plan to suggest that cperl-mode.el gets a "dual life" in both Emacs
and on ELPA on emacs-devel.

As a preparation, I added two helpers for the newer functions
'time-convert' and 'format-patch', following a suggestion by Stefan
Monnier.  He actually wrote cperl--format-patch in a message to
emacs-devel and therefore is listed as co-author in the commit message.
--
Cheers,
haj