Ticket was cloned from Red Hat Bugzilla (product Red Hat Enterprise Linux 7): Bug 1159330

ipa-server-install incorrectly calls setsebool with None as an option value. Producing:

WARNING: Could not set SELinux booleans: httpd_can_network_connect=None httpd_manage_ipa=None

or

WARNING: Could not set SELinux booleans: samba_portmapper=None

Initial investigation suggests that c7d6fea removes 'if restored state is None' check.

- sebool_state = self.restore_state(var)
- if not sebool_state is None:

Reproduction:

• for httpd_*: call {{{ipa-server-install --uninstall -U}}} twice in a row,
• samba_portmapper case was seen in first --uninstall call on Fedora