MFH: r514172

fetchmail: Fix manpage rendering w/ groff, fix t.smoke failure

PR: 240914
PR: 241032
Submitted by: Corey Halpin (maintainer)
Reported by: Helge Oldach, Konstantin Belousov

One patch removes a .br from the .man page to fix manpage rendering
with groff on FreeBSD 12.0, one patch changes the environment for a
build-time self-test that will not be installed but unbreaks a build
in some configurations, hence claiming blanket approval.

Approved by: ports-secteam@ (blanket)