ipa-client: Set NIS domain name in the installer
    
    Provides two new options for the ipa-client-install:
        --nisdomain: specifies the NIS domain name
        --no_nisdomain: flag to aviod setting the NIS domain name
    
    In case no --nisdomain is specified and --no_nisdomain flag was
    not set, the IPA domain is used.
    
    Manual pages updated.
    
    http://fedorahosted.org/freeipa/ticket/3202
    
    Reviewed-By: Jakub Hrozek <jhrozek@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>