Document fetch(1) environment variables in fetch(1) man page, instead of taking lazy users on the arduous journey through SEE ALSO to fetch(3).
Document fetch(1) environment variables in fetch(1) man page, instead of
taking lazy users on the arduous journey through SEE ALSO to fetch(3).

PR:		docs/61759
Submitted by:	Christian S.J. Peron <maneo@bsdpro.com>

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