Such patches should be passsed along to the individual package
maintainer, unless the package maintainer is "XEmacs Development
Team". We shoudl get in the habit of doing this automatically to
avoid package drift.
In the case of cperl-mode, it is supposedly maintaineed by Karl
Hegbloom, so patches to it should be passed to him for resolution.
Complaints should go to him as well; that's part of the job.