Function nginx::DH_meth_set_generate_params

pub unsafe extern "C" fn DH_meth_set_generate_params(
    dhm: *mut DH_METHOD, 
    generate_params: Option<unsafe extern "C" fn(arg1: *mut DH, arg2: c_int, arg3: c_int, arg4: *mut BN_GENCB) -> c_int>
) -> c_int