Jim, Bruno, Any objections to relicensing cloexec as LGPL? set_cloexec_flag is only a thin wrapper around fcntl, which currently isn't adding much content beyond a low level function that is present everywhere except mingw. dup_cloexec is a bit more complicated, and was borrowed from the GPL module pipe, but again, it is merely exposing features of the system in a convenient API rather than inventing new features. If we don't relicense, then rpl_fcntl and O_CLOEXEC support will have to be GPL, which seems weird, since open is currently LGPL.
-- Eric Blake
