Add allow-sendfilefd flag for Debian GNU/kFreeBSD #164
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On Debian GNU/kFreeBSD (FreeBSD kernel plus glibc), the BSD flavour of
sendfile is not usable, but Cabal treats kfreebsdgnu as os(freebsd) so I
had to add a flag to simple-sendfile.cabal to make it possible to select
the fallback implementation. See
kazu-yamamoto/simple-sendfile#13 for more
details.
warp.cabal reflects the availability of interfaces from simple-sendfile,
and so I believe it needs a matching flag to make it possible to
forcibly disable the use of -DSENDFILEFD.