[SSSD] [sssd PR#585][comment] tcurl: do not log the payload

[jhrozek]

URL: https://github.com/SSSD/sssd/pull/585
Title: #585: tcurl: do not log the payload

jhrozek commented:
"""
Ack. If someone can set an environment variable in SSSD there are more harmful things they can do than logging a TGT value into a file only readable by root.
"""

See the full comment at https://github.com/SSSD/sssd/pull/585#issuecomment-394835399