[Bug-tar] infinite symlink directory loop causes segfault with --create --dereference

[Pavel Raiskup]

Subject says it pretty much all, but see the Red Hat bugreport for
backtrace and other files [1].

Attached patch fixes this by not recursing down to the loop - not sure
whether the looping directory point should be backed up also, but
it makes sense IMO (as the symlink itself would be otherwise backed up if
the --dereference option was not specified.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1115890

Pavel

0001-create-do-not-segfault-with-dereference.patch
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