Harder to port than the others, and doesn't seem really desirable
for OpenBSD anyway, so mactelnetd is in the too-hard basket for now.

Index: src/mactelnetd.c
--- src/mactelnetd.c.orig
+++ src/mactelnetd.c
@@ -37,7 +37,7 @@
 #else
 #include <endian.h>
 #endif
-#if defined(__FreeBSD__) || defined(__APPLE__)
+#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__OpenBSD__)
 #include <paths.h>
 #endif
 #include <time.h>
@@ -64,7 +64,7 @@
 #include <sys/sysinfo.h>
 #endif
 #include <pwd.h>
-#if defined(__FreeBSD__) || defined(__APPLE__)
+#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__OpenBSD__)
 #include <sys/time.h>
 /* This is the really Posix interface the Linux code should have used !!*/
 #include <utmpx.h>