[sssd PR#5766][comment] Sources cleanup - part 3.

[pbrezina]

URL: https://github.com/SSSD/sssd/pull/5766
Title: #5766: Sources cleanup - part 3.

pbrezina commented:
"""
As discussed here: https://github.com/SSSD/sssd/pull/5766#discussion_r703040120
If you encoutner malformed entry, delete it. But klist should return empty ccache, not an error.
"""

See the full comment at https://github.com/SSSD/sssd/pull/5766#issuecomment-924838162