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cem
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2017-04-04T05:56:42.829361Z
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bsdgrep(1): create rgrep link

Create a convenience rgrep link for bsdgrep(1) that observes 'grep -r'
behavior.

A follow-up to r316473.

Submitted by:	Kyle Evans <kevans91 at ksu.edu>
Reviewed by:	emaste (earlier version), cem
Differential Revision:	https://reviews.freebsd.org/D10109

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