change in -r behavior needs manpage update

[fragglemeat]

In commit c6e3ea6 you changed the behavior of -r to only recurse
symlinks given on the command line.  That commit included updates to
the --help output and the texinfo, but it neglected to update
doc/grep.in.1 so the manpage is still incorrect.

Also, when I try to view the commit at
<http://git.savannah.gnu.org/cgit/grep.git/commit/?id=c6e3ea61d9f08aa0128a0eb13d31a2fbad376f99>
I get an error "No repositories found" from cgit.  But other commits
display fine.