IO hang on next EWOULDBLOCK after adding send fd to epoll.
Problem is when we are rearming send fd after send is blocked, we are
setting data->ptr which is overwriting data->fd since its union.
I am not sure why we are setting data->ptr, don't see any use of it,
all we need is data fd.
Fixed it with this patch
https://github.com/nfs-ganesha/ntirpc/pull/214
-Gaurav