Complete the transition from HastyMail to Cypht (Ex.: replace hm_ in the code base) #602
Description
The ancestor of Cypht is https://sourceforge.net/projects/hastymail/
Cypht still has references to hastymail (hm_) both in source code and file names such as https://github.com/jasonmunro/cypht/blob/master/modules/carddav_contacts/hm-carddav.php
This is low priority but we should clean this up one day. Since this could cause issues for external software connecting to Cypht, it will provoke a major revision. Very likely to be 3.0