Function gnunet_sys::GNUNET_NETWORK_fdset_add

pub unsafe extern "C" fn GNUNET_NETWORK_fdset_add(
    dst: *mut GNUNET_NETWORK_FDSet, 
    src: *const GNUNET_NETWORK_FDSet
)

Add one fd set to another (computes the union).

@param dst the fd set to add to @param src the fd set to add from