[SSSD] [sssd PR#356][comment] IFP: fix typo in option name in man pages

[fidencio]

URL: https://github.com/SSSD/sssd/pull/356
Title: #356: IFP: fix typo in option name in man pages

fidencio commented:
"""
Obvious ack, thanks!
"""

See the full comment at https://github.com/SSSD/sssd/pull/356#issuecomment-324900966