Change the default installation directory for modules to /boot/modules.

Kernel installs always override KMODDIR when installing modules, so
this default setting is only used for standalone module builds.  Many
out-of-tree modules manually override KMODDIR already to avoid placing
modules in /boot/kernel.  This now makes that behavior the default.

Discussed on:	arch@
Reviewed by:	imp
Relnotes:	yes

UPDATING

@@ -31,6 +31,14 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 11.x IS SLOW:
 	disable the most expensive debugging functionality run
 	"ln -s 'abort:false,junk:false' /etc/malloc.conf".)
 
+20160510:
+	Kernel modules compiled outside of a kernel build now default to
+	installing to /boot/modules instead of /boot/kernel.  Many kernel
+	modules built this way (such as those in ports) already overrode
+	KMODDIR explicitly to install into /boot/modules.  However,
+	manually building and installing a module from /sys/modules will
+	now install to /boot/modules instead of /boot/kernel.
+
 20160414:
 	The CAM I/O scheduler has been committed to the kernel. There should be
 	no user visible impact. This does enable NCQ Trim on ada SSDs. While the

share/mk/bsd.own.mk

@@ -165,11 +165,7 @@ BINGRP?=	wheel
 BINMODE?=	555
 NOBINMODE?=	444
 
-.if defined(MODULES_WITH_WORLD)
 KMODDIR?=	/boot/modules
-.else
-KMODDIR?=	/boot/kernel
-.endif
 KMODOWN?=	${BINOWN}
 KMODGRP?=	${BINGRP}
 KMODMODE?=	${BINMODE}