Ticket #48224 - logconv.pl should handle *.tar.xz, *.txz, *.xz log files
    
    https://fedorahosted.org/389/ticket/48224
    Reviewed by: ???
    Branch: 389-ds-base-1.3.4
    Fix Description: There is no xz support by default, the perl module
    IO::Uncompress::UnXz is required for that.  Also, Tar::Archive can't
    handle xz files by default, so they have to be uncompressed first.
    This will also need a spec file change:
    Requires: perl-IO-Compress
    Requires: perl-IO-Compress-Lzma
    Platforms tested: Fedora 21
    Flag Day: no
    Doc impact: no
    
    (cherry picked from commit d1b0acd12faa620774c66044f91e509ae175e4a1)