BSD and POSIX

Finally got around to installing OpenBSD (rev 3.3) in a vmware partition.
Found that several #if BSD's were inappropriate for modern BSD's.  Haven't
installed FreeBSD or NetBSD, but based on reading their man pages,
these changes are needed there too.  Mostly due to POSIX time() signature.

src/u_init.c

@@ -583,7 +583,7 @@ u_init()
 			aligns[flags.initalign].value;
 	u.ulycn = NON_PM;
 
-#ifdef BSD
+#if defined(BSD) && !defined(POSIX_TYPES)
 	(void) time((long *)&u.ubirthday);
 #else
 	(void) time(&u.ubirthday);