Check FreeBSD upstream changes and apply important patches.

* sysv_sem.cc (__semctl): Check copyin return value (from 1.76).
	* sysv_shm.cc (shminit): Actually use the iterating variable in the
	for loop when trying to avoid overflow (from 1.102).

winsup/cygserver/sysv_msg.cc

@@ -28,6 +28,7 @@
 #define __FBSDID(s)	const char version[] = (s)
 #endif
 __FBSDID("$FreeBSD: /usr/local/www/cvsroot/FreeBSD/src/sys/kern/sysv_msg.c,v 1.52 2003/11/07 04:47:14 rwatson Exp $");
+/* CV, 2006-01-09: Inspected upstream up to version 1.60. */
 
 #define _KERNEL 1
 #define __BSD_VISIBLE 1