Reduce the set of things on the disc1 image to those on the bootonly image.

Notably, this removes the toolchain from the CD-ROM image (it remains on DVD
images) and pushes the CD-ROM image well below the 700 MB mark.

MFC after:	10 days

release/Makefile

@@ -171,9 +171,11 @@ disc1: packagesystem
 # Install system
 	mkdir -p ${.TARGET}
 	cd ${WORLDDIR} && ${IMAKE} installkernel installworld distribution \
-		DESTDIR=${.OBJDIR}/${.TARGET} MK_RESCUE=no MK_KERNEL_SYMBOLS=no \
-		MK_PROFILE=no MK_SENDMAIL=no MK_TESTS=no MK_LIB32=no \
-		MK_DEBUG_FILES=no
+	    DESTDIR=${.OBJDIR}/${.TARGET} MK_AMD=no MK_AT=no \
+	    MK_INSTALLLIB=no MK_LIB32=no MK_MAIL=no \
+	    MK_NCP=no MK_TOOLCHAIN=no MK_PROFILE=no \
+	    MK_RESCUE=no MK_DICT=no \
+	    MK_KERNEL_SYMBOLS=no MK_TESTS=no MK_DEBUG_FILES=no
 # Copy distfiles
 	mkdir -p ${.TARGET}/usr/freebsd-dist
 	for dist in MANIFEST $$(ls *.txz | grep -vE -- '(base|lib32)-dbg'); \