Tackle the endian.h mess. Make it so that:

* you can #include <sys/endian.h> instead of <machine/endian.h>,
and ditto <endian.h>  (fixes code that pulls in <sys/endian.h> first)
* those will always export the symbols that POSIX specified for
<endian.h>, including the new {be,le}{16,32,64}toh() set.  c.f.
http://austingroupbugs.net/view.php?id=162
if __BSD_VISIBLE then you also get the symbols that our <machine/endian.h>
currently exports (ntohs, NTOHS, dlg's bemtoh*, etc)
* when doing POSIX compiles (not __BSD_VISIBLE), then <netinet/in.h> and
<arpa/inet.h> will *stop* exporting the extra symbols like BYTE_ORDER
and betoh*
ok deraadt@

src/include/Makefile

@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile,v 1.191 2014/07/11 21:50:28 tedu Exp $
+#	$OpenBSD: Makefile,v 1.192 2014/07/12 16:25:08 guenther Exp $
 #	$NetBSD: Makefile,v 1.59 1996/05/15 21:36:43 jtc Exp $
 
 #	@(#)Makefile	5.45.1.1 (Berkeley) 5/6/91
@@ -28,7 +28,7 @@ FILES+= ieeefp.h
 .endif
 
 MFILES=	frame.h
-LFILES=	fcntl.h syslog.h termios.h stdarg.h stdint.h varargs.h
+LFILES=	endian.h fcntl.h syslog.h termios.h stdarg.h stdint.h varargs.h
 
 DIRS=	arpa protocols rpc rpcsvc
 LDIRS=	crypto ddb dev isofs miscfs msdosfs net netinet netinet6 \

src/include/arpa/inet.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: inet.h,v 1.15 2012/12/05 23:19:57 deraadt Exp $	*/
+/*	$OpenBSD: inet.h,v 1.16 2014/07/12 16:25:08 guenther Exp $	*/
 
 /*
  * ++Copyright++ 1983, 1993
@@ -62,7 +62,14 @@
 /* External definitions for functions in inet(3) */
 
 #include <sys/types.h>
-#include <machine/endian.h>
+
+/* <sys/_endian.h> is pulled in by <sys/types.h> */
+#ifndef htons
+#define htons(x)	__htobe16(x)
+#define htonl(x)	__htobe32(x)
+#define ntohs(x)	__htobe16(x)
+#define ntohl(x)	__htobe32(x)
+#endif
 
 #ifndef	_SOCKLEN_T_DEFINED_
 #define	_SOCKLEN_T_DEFINED_