[bug #17623] add option to grep -R to NOT follow symlinks to directory

[Paolo Bonzini]

Update of bug #17623 (project grep):

                Severity:              3 - Normal => 2 - Minor              
                 Summary: grep -R should NOT follow symlinks => add option to
grep -R to NOT follow symlinks to directory

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Follow-up Comment #4:

What about --[no-]dereference-symlink-to-dir (can be shortened to
--[no-]dereference since there's no ambiguous option)?  cp's -H could become
--dereference-symlink-to-dir=cmdline (using an optional argument).

-S can be used as a short option.

Karl's proposal to have --directories=recurse-no-symlink is a bit ugly
because there is no quick way to specify it as a short option.

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