Re: add envsubst examples

[Dan Jacobson]

Bruno> The envsubst command is not meant for direct use by the user; therefore
Bruno> it's not appropriate to provide examples about its use.

OK, then please add such a warning high on the man page.

Bruno> From the location in the documentation - in section "Shell
Bruno> Scripts" - you can infer that the program is related to
Bruno> gettext.sh.

Well if one learns about it from
$ apropos ^env
one won't know about such context.