Function SSL_CTX_add_server_custom_ext

pub unsafe extern "C" fn SSL_CTX_add_server_custom_ext(
    ctx: *mut ssl_ctx_st,
    ext_type: u32,
    add_cb: Option<unsafe extern "C" fn(*mut ssl_st, u32, *mut *const u8, *mut usize, *mut i32, *mut c_void) -> i32>,
    free_cb: Option<unsafe extern "C" fn(*mut ssl_st, u32, *const u8, *mut c_void)>,
    add_arg: *mut c_void,
    parse_cb: Option<unsafe extern "C" fn(*mut ssl_st, u32, *const u8, usize, *mut i32, *mut c_void) -> i32>,
    parse_arg: *mut c_void,
) -> i32