Update main to 16

* Bumps to versions in lib/clang
* Bumps to sys/conf/newvers.sh and sys/sys/param.h
* Update to UPDATING

Approved by:	re (implicit)
Sponsored by:	https://www.patreon.com/cperciva

UPDATING

@@ -12,8 +12,8 @@ Items affecting the ports and packages system can be found in
 /usr/ports/UPDATING.  Please read that file before updating system packages
 and/or ports.
 
-NOTE TO PEOPLE WHO THINK THAT FreeBSD 15.x IS SLOW:
-	FreeBSD 15.x has many debugging features turned on, in both the kernel
+NOTE TO PEOPLE WHO THINK THAT FreeBSD 16.x IS SLOW:
+	FreeBSD 16.x has many debugging features turned on, in both the kernel
 	and userland.  These features attempt to detect incorrect use of
 	system primitives, and encourage loud failure through extra sanity
 	checking and fail stop semantics.  They also substantially impact
@@ -27,6 +27,9 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 15.x IS SLOW:
 	world, or to merely disable the most expensive debugging functionality
 	at runtime, run "ln -s 'abort:false,junk:false' /etc/malloc.conf".)
 
+20250905:
+	FreeBSD 16.0-CURRENT.
+
 20250903:
 	The BLOAT_KERNEL_WITH_EXTERR kernel config option has been renamed to
 	EXTERR_STRINGS.

lib/clang/freebsd_cc_version.h

@@ -1 +1 @@
-#define	FREEBSD_CC_VERSION		1500000
+#define	FREEBSD_CC_VERSION 1600000

lib/clang/include/lld/Common/Version.inc

@@ -1,4 +1,4 @@
 // Local identifier in __FreeBSD_version style
-#define LLD_FREEBSD_VERSION 1500001
+#define LLD_FREEBSD_VERSION 1600000
 
 #define LLD_VERSION_STRING "19.1.7 (FreeBSD llvmorg-19.1.7-0-gcd708029e0b2-" __XSTRING(LLD_FREEBSD_VERSION) ")"

sys/conf/newvers.sh

@@ -50,8 +50,8 @@
 #
 
 TYPE="FreeBSD"
-REVISION="15.0"
-BRANCH="PRERELEASE"
+REVISION="16.0"
+BRANCH="CURRENT"
 if [ -n "${BRANCH_OVERRIDE}" ]; then
 	BRANCH=${BRANCH_OVERRIDE}
 fi

sys/sys/param.h

@@ -74,7 +74,7 @@
  * cannot include sys/param.h and should only be updated here.
  */
 #undef __FreeBSD_version
-#define __FreeBSD_version 1500063
+#define __FreeBSD_version 1600000
 
 /*
  * __FreeBSD_kernel__ indicates that this system uses the kernel of FreeBSD,