pub unsafe extern "C" fn libssh2_knownhost_check(
    hosts: *mut LIBSSH2_KNOWNHOSTS,
    host: *const c_char,
    key: *const c_char,
    keylen: size_t,
    typemask: c_int,
    knownhost: *mut *mut libssh2_knownhost
) -> c_int