Global DNS configuration is a nice tool to maintain a common DNS
settings stored in LDAP which are then used for all enrolled IPA
servers. However, the settings stored in LDAP override local
settings in named.conf on DNS servers.

This patch adds more information about global DNS configuration
options in install scripts and DNS module help.

https://fedorahosted.org/freeipa/ticket/2525

Server framework calls acutil.res_send() to send DNS queries used
for various DNS tests. However, once acutil is imported it does
not change its list of configured resolvers even when
/etc/resolv.conf is changed. This may lead to unexpected
resolution issues.

We should at least reload httpd when we change /etc/resolv.conf to
point to FreeIPA nameserver to force a new import of acutil and
thus workaround this bug until it is resolved in authconfig.

https://fedorahosted.org/freeipa/ticket/2481

Admin e-mail validator currently requires an email to be in
a second-level domain (hostmaster@example.com). This is too
restrictive. Top level domain e-mails (hostmaster@testrelm)
should also be allowed.

This patch also fixes default zonemgr value in help texts and man
pages.

https://fedorahosted.org/freeipa/ticket/2272

The description of 'no-reverse' option was fixed in both code and
manpages of ipa-replica-install and ipa-dns-install.

https://fedorahosted.org/freeipa/ticket/2161

A server may have 2 or more NICs and its hostname may thus resolve
to 2 and more forward addresses. IP address checks in install
scripts does not expect this setup and may fail or crash.

This script adds a support for multiple forward addresses for
a hostname. The install scripts do not crash now. When one IP
address is needed, user is asked to choose from all detected
server IP addresses.

https://fedorahosted.org/freeipa/ticket/2154

change default_logger_level to debug in configure_standard_logging

add new ipa_log_manager module, move log_mgr there, also export
root_logger from log_mgr.

change all log_manager imports to ipa_log_manager and change
log_manager.root_logger to root_logger.

add missing import for parse_log_level()

Do at least a basic validation of DNS zone manager mail address.

Do not require '@' to be in the mail address as the SOA record
stores this value without it and people may be used to configure
it that way. '@' is always removed by the installer/dns plugin before
the DNS zone is created.

https://fedorahosted.org/freeipa/ticket/1966

When getpass.getpass() function is interrupted via CTRL+D, EOFError
exception is thrown. Most of the install tools are not prepared for
this event and crash with this exception. Make sure that it is
handled properly and nice error message is printed.

https://fedorahosted.org/freeipa/ticket/1916

Integrate new bind-dyndb-ldap features to automatically track
DNS data changes:

 1) Zone refresh
    Set --zone-refresh in installation to define number of seconds
    between bind-dyndb-ldap polls for new DNS zones. User now
    doesn't have to restart name server when a new zone is added.

 2) New zone notifications
    Use LDAP persistent search mechanism to immediately get
    notification when any new DNS zone is added. Use --zone-notif
    install option to enable. This option is mutually exclusive
    with Zone refresh.

To enable this functionality in existing IPA installations,
update a list of arguments for bind-dyndb-ldap in /etc/named.conf.
An example when zone refresh is disabled and DNS data change
notifications (argument psearch of bind-dyndb-ldap) are enabled:

dynamic-db "ipa" {
...
        arg "zone_refresh 0";
        arg "psearch yes";
};

This patch requires bind-dyndb-ldap-1.0.0-0.1.b1 or later.

https://fedorahosted.org/freeipa/ticket/826