A high-level description of the design and ACIs for trusts is available at
https://www.redhat.com/archives/freeipa-devel/2011-December/msg00224.html
and
https://www.redhat.com/archives/freeipa-devel/2011-December/msg00248.html

Ticket #1731

resolve_host() function returns a list of IP addresses. Handle it all rather
than expecting that there is a single address.

It wouldn't hurt to make a common function that takes --ip-address into account
when resolving host addresses and use it everywhere.

IPA client and server tool set used authconfig acutil module to
for client DNS operations. This is not optimal DNS interface for
several reasons:
- does not provide native Python object oriented interface
  but but rather C-like interface based on functions and
  structures which is not easy to use and extend
- acutil is not meant to be used by third parties besides
  authconfig and thus can break without notice

Replace the acutil with python-dns package which has a feature rich
interface for dealing with all different aspects of DNS including
DNSSEC. The main target of this patch is to replace all uses of
acutil DNS library with a use python-dns. In most cases, even
though the larger parts of the code are changed, the actual
functionality is changed only in the following cases:
- redundant DNS checks were removed from verify_fqdn function
  in installutils to make the whole DNS check simpler and
  less error-prone. Logging was improves for the remaining
  checks
- improved logging for ipa-client-install DNS discovery

https://fedorahosted.org/freeipa/ticket/2730
https://fedorahosted.org/freeipa/ticket/1837

Output message of the 'read_domain_name' function in ipa-server-install
was reworded.

https://fedorahosted.org/freeipa/ticket/2704

We were inferring that an agreement existed if the host was present
as an IPA host. This was not enough if the replica installation failed
early enough.

https://fedorahosted.org/freeipa/ticket/2030

Wrap printing exceptions in unicode() to do Gettext conversion.

https://fedorahosted.org/freeipa/ticket/2196

pkisilent does not handle these properly.

https://fedorahosted.org/freeipa/ticket/2675

IPA has some unused code from abandoned features (Radius, ipa 1.x user
input, commant-line tab completion), as well as some duplicate utilities.
This patch cleans up the utility modules.

Duplicate code consolidated into ipapython.ipautil:
    {ipalib.util,ipaserver.ipautil,ipapython.ipautil}.realm_to_suffix
    {ipaserver,ipapython}.ipautil.CIDict
            (with style improvements from the ipaserver version)
    {ipapython.entity,ipaserver.ipautil}.utf8_encode_value
    {ipapython.entity,ipaserver.ipautil}.utf8_encode_values

ipalib.util.get_fqdn was removed in favor of the same function in
ipaserver.install.installutils

Removed unused code:
    ipalib.util:
        load_plugins_in_dir
        import_plugins_subpackage
        make_repr (was imported but unused; also removed from tests)

    ipapython.ipautil:
        format_list
        parse_key_value_pairs
        read_pairs_file
        read_items_file
        user_input_plain
        AttributeValueCompleter
        ItemCompleter

    ipaserver.ipautil:
        get_gsserror (a different version exists in ipapython.ipautil)

ipaserver.ipautil ended up empty and is removed entirely.

https://fedorahosted.org/freeipa/ticket/2650

SELinux configuration for httpd instance was set for new
installations only. Upgraded IPA servers (namely 2.1.x -> 2.2.x
upgrade) missed the configuration. This lead to AVCs when httpd
tries to contact ipa_memcached and user not being able to log in.

This patch updates ipa-upgradeconfig to configure SELinux
in the same way as ipa-server-install does.

https://fedorahosted.org/freeipa/ticket/2603