[patch #6474] Issue warning if recursively searching stdin

[Eric Blake]

Follow-up Comment #3, patch #6474 (project grep):

What's wrong with having your alias temporarily set GREP_OPTIONS for just the
duration of the use of your alias?  That is, instead of:

alias grp 'grep -r -l ...'

use

alias grp 'GREP_OPTIONS=-r grep -l ...'


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