[SSSD] [sssd PR#413][comment] mmap_cache: add SID and type to struct sss_mc_rec

[lslebodn]

URL: https://github.com/SSSD/sssd/pull/413
Title: #413: mmap_cache: add SID and type to struct sss_mc_rec

lslebodn commented:
"""
Memory cache is critical part of client code and it is a nice tradition to write integration tests together with new features there.
"""

See the full comment at https://github.com/SSSD/sssd/pull/413#issuecomment-338185362