[SSSD] [sssd PR#5750][comment] fix compilation warnings

URL: https://github.com/SSSD/sssd/pull/5750 Title: #5750: fix compilation warnings elkoniu commented: """ I think @alexey-tikhonov is right, you can just change signature of `sss_getenv()` to return `const char*`. As this memory is released by talloc there will be no issue with calling `free()` on const pointer. """ See the full comment at https://github.com/SSSD/sssd/pull/5750#issuecomment-900330779