pacman should be able to extract an email address from PACKAGER for WKD
lookup, so issue a warning if it is not of the form
"Example Name <email@address.invalid>". Neither the name nor the email
address must contain additional angle brackets.
Signed-off-by: Jonas Witschel <diabonas@archlinux.org>
Signed-off-by: Allan McRae <allan@archlinux.org>