OpenXT 6.0.0
Merge pull request #35 from eric-ch/stable-6_oxt-326 STABLE-6: OXT-326: get_unused_fd{,_flags}() depending on Linux kernel versions.
Merge pull request #35 from eric-ch/stable-6_oxt-326 STABLE-6: OXT-326: get_unused_fd{,_flags}() depending on Linux kernel versions.