Function nginx::SSL_CTX_add_server_custom_ext

pub unsafe extern "C" fn SSL_CTX_add_server_custom_ext(
    ctx: *mut SSL_CTX, 
    ext_type: c_uint, 
    add_cb: custom_ext_add_cb, 
    free_cb: custom_ext_free_cb, 
    add_arg: *mut c_void, 
    parse_cb: custom_ext_parse_cb, 
    parse_arg: *mut c_void
) -> c_int