ONLY_FOR_ARCHS_REASON is used as part of the sentence and thus should
start with lower-case letter and not end with a period which is added
by the framework, similar to other knobs like BROKEN, IGNORE, et al.
While here, remove needless quoting, add missing Oxford comma, expand
contractions and jargonisms, use correct spelling for proper names.
This allows for port testing with lang/go-devel via GO_PORT, setting
up the Go build environment in a single place, and is step one in
simplifying Go ports that often define too complicated do-build
targets themselves.
USES=go gains new arguments 'run' to add lang/go to RUN_DEPENDS and
'no_targets' for ports with composite builds that call 'go' themselves
and do not need the do-build/do-install targets of USES=go.
PR: 238849
Submitted by: dg@syrec.org (also D20745)
Reviewed by: mat, tobik
Exp-run by: antoine
Differential Revision: https://reviews.freebsd.org/D20746
