[SSSD] [sssd PR#5411][comment] ifp: fix original fix use-after-free

[alexey-tikhonov]

  URL: https://github.com/SSSD/sssd/pull/5411
Title: #5411: ifp: fix original fix use-after-free

alexey-tikhonov commented:
"""
I think straightforward `strdup` would be more clear (instead of changing ownership) but
nonetheless ACK.
"""

See the full comment at https://github.com/SSSD/sssd/pull/5411#issuecomment-731200986