Fix ipa-server-install for dual NICs
    
    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