Cleanup uses of clone()
Just use a non-throwing one based in Iced or DTask.
Fix possible TAtomic bug
Rare race for doing update-in-place TAtomic updates.
Do a shallow defensive clone first.
Turn fvec parse progress back on.
Cleanup some fvec functions (less code, more comments).
Merge branch 'master' of github.com:0xdata/h2o