Follow the upstream recommendations for packagers and switch to
multi-packages:
devel/gettext -> devel/gettext,-runtime
devel/gettext-tools -> devel/gettext,-tools
(new) devel/gettext,-textstyle
incomprehensible with both groff and mandoc.
Issue found because naddy@ reported that mandoc complains about another
bug (unknown macro) in just the same sentence - correcting this, too.
While here, remove USE_GROFF and add @comment bin/utf8lookup. Bump.
OK nicm@ (MAINTAINER)