Kill the /usr/include/ssl symlink

Proposed some time ago by tedu@, builk build by ajacoutot@

src/include/Makefile

@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile,v 1.215 2016/11/08 19:56:56 tb Exp $
+#	$OpenBSD: Makefile,v 1.216 2016/11/12 03:04:27 jca Exp $
 #	$NetBSD: Makefile,v 1.59 1996/05/15 21:36:43 jtc Exp $
 
 #	@(#)Makefile	5.45.1.1 (Berkeley) 5/6/91
@@ -81,7 +81,6 @@ includes:
 			${INSTALL} ${INSTALL_COPY} -m 444 $$j ${DESTDIR}/usr/include/$$i/$$j; \
 		done; \
 	done
-	@ln -sfh openssl ${DESTDIR}/usr/include/ssl
 	@echo installing ${LFILES}
 	@for i in ${LFILES}; do \
 		rm -f ${DESTDIR}/usr/include/$$i && \