[sssd PR#918][comment] Add support for NSS hosts database lookup.

[sumit-bose]

URL: https://github.com/SSSD/sssd/pull/918
Title: #918: Add support for NSS hosts database lookup.

sumit-bose commented:
"""
Thanks, sorry for nitpicking, but `ldap_iphost_entry_usn` is still missing in some files:

```
$ git grep -E '(ldap_iphost_name|ldap_iphost_entry_usn)' ../
../src/config/SSSDConfig/sssdoptions.py:        'ldap_iphost_name': _('IP host name attribute'),
../src/config/cfg_rules.ini:option = ldap_iphost_name
../src/config/etc/sssd.api.d/sssd-ad.conf:ldap_iphost_name = str, None, false
../src/config/etc/sssd.api.d/sssd-ldap.conf:ldap_iphost_name = str, None, false
../src/man/sssd-ldap-attributes.5.xml:                    <term>ldap_iphost_name (string)</term>
../src/providers/ad/ad_opts.c:    { "ldap_iphost_name", "cn", SYSDB_NAME, NULL },
../src/providers/ad/ad_opts.c:    { "ldap_iphost_entry_usn", NULL, SYSDB_USN, NULL },
../src/providers/ldap/ldap_opts.c:    { "ldap_iphost_name", "cn", SYSDB_NAME, NULL },
../src/providers/ldap/ldap_opts.c:    { "ldap_iphost_entry_usn", NULL, SYSDB_USN, NULL },
```

bye,
Sumit
"""

See the full comment at https://github.com/SSSD/sssd/pull/918#issuecomment-593489917