MFH: r538858

mail/fetchmail: update to 6.4.8, adds Serbian translation, ...

and updates a few other translations:
Czech, French, Japanese, Polish, Albanian, Swedish, Chinese/simplified,
Esperanto.

PR: 247261
Approved by: chalpin@cs.wisc.edu (Corey Halpin, maintainer)

Approved by: ports-secteam@ (JoNeum@)