include openbsd-compat/base64.c license in LICENSE

Author: djmdjm

LICENCE

@@ -367,5 +367,46 @@ OpenSSH contains no GPL code.
          * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
          * POSSIBILITY OF SUCH DAMAGE.
 
+       The replacement base64 implementation has the following MIT-style
+       licenses:
+
+         * Copyright (c) 1996 by Internet Software Consortium.
+         *
+         * Permission to use, copy, modify, and distribute this software for any
+         * purpose with or without fee is hereby granted, provided that the above
+         * copyright notice and this permission notice appear in all copies.
+         *
+         * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
+         * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+         * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
+         * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+         * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+         * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+         * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+         * SOFTWARE.
+
+         * Portions Copyright (c) 1995 by International Business Machines, Inc.
+         *
+         * International Business Machines, Inc. (hereinafter called IBM) grants
+         * permission under its copyrights to use, copy, modify, and distribute this
+         * Software with or without fee, provided that the above copyright notice and
+         * all paragraphs of this notice appear in all copies, and that the name of IBM
+         * not be used in connection with the marketing of any product incorporating
+         * the Software or modifications thereof, without specific, written prior
+         * permission.
+         *
+         * To the extent it has a right to do so, IBM grants an immunity from suit
+         * under its patents, if any, for the use, sale or manufacture of products to
+         * the extent that such products are used for performing Domain Name System
+         * dynamic updates in TCP/IP networks by means of the Software.  No immunity is
+         * granted for any product per se or for any other function of any product.
+         *
+         * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES,
+         * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+         * PARTICULAR PURPOSE.  IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL,
+         * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING
+         * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN
+         * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
 ------
 $OpenBSD: LICENCE,v 1.20 2017/04/30 23:26:16 djm Exp $