[Bug 240539] tuntap: Getting "ifconfig: ioctl SIOCSIFNAME (set name): File exists" from `ifconfig tap create name tap0`

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=240539

--- Comment #7 from commit-hook at freebsd.org ---
A commit references this bug:

Author: kevans
Date: Fri Sep 20 21:27:42 UTC 2019
New revision: 352565
URL: https://svnweb.freebsd.org/changeset/base/352565

Log:
  MFC r352246: SIOCSIFNAME: Do nothing if we're not actually changing

  Instead of throwing EEXIST, just succeed if the name isn't actually
  changing. We don't need to trigger departure or any of that because there's
  no change from consumers' perspective.

  PR:           240539

Changes:
_U  stable/11/
  stable/11/sys/net/if.c
_U  stable/12/
  stable/12/sys/net/if.c

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