Fix selected minor issues in the spec file and license
    
    This patch fixes:
    - too long description for server-trust-ad subpackage
    - adds (noreplace) flag %{_sysconfdir}/tmpfiles.d/ipa.conf to avoid
      overwriting potential user changes
    - changes permissions on default_encoding_utf8.so to prevent it
      pollute python subpackage Provides.
    - wrong address in GPL v2 license preamble in 2 distributed files
    
    https://fedorahosted.org/freeipa/ticket/3855