MFH: r544270 r544271 r544289

mail/notmuch: reset maintainership

Maintainer stops using FreeBSD.

PR: 248492
Submitted by: seschwar@gmail.com (maintainer)

mail/py-afew: reset maintainership

Maintainer stops using FreeBSD.

PR: 248491
Submitted by: seschwar@gmail.com (maintainer)

mail/py-afew, mail/notmuch: Take MAINTAINER'ship

Approved by: ports-secteam (blanket: consistent port/package metadata)
Reported by: koobs