For variables that are only checked with defined(), don't provide

any fake value.

While here, sort NO*'s in dictionary order to ease searching by a
human being.

tools/tools/nanobsd/make.conf

@@ -7,42 +7,42 @@
 # $FreeBSD$
 #
 KERNCONF?=GENERIC
-NO_ACPI=yes
-NO_BLUETOOTH=yes
-NO_CVS=yes
-NO_CXX=yes
-NO_FORTRAN=yes
-NO_GCOV=yes
-NO_GDB=yes
-NO_HESIOD_LIBC=yes
-NO_I4B=yes
-NO_IPFILTER=yes
-NO_PF=yes
-NO_AUTHPF=yes
-NO_KERBEROS=yes
-NO_LPR=yes
-NO_MODULES=yes
-NO_OBJC=yes
-NO_RESCUE=yes
-NO_SENDMAIL=yes
-NO_SHAREDOCS=yes
-NO_TOOLCHAIN=yes
-NO_USB=yes
-NO_VINUM=yes
-#NO_YP_LIBC=yes
-NOATM=yes
-NOGAMES=yes
-NOHTML=yes
-NOINET6=yes
-NOINFO=yes
-NOLIBTHR=yes
-NOMAN=yes
-NOPROFILE=yes
-NORADIUS=yes
+NO_ACPI=
+NOATM=
+NO_AUTHPF=
+NO_BLUETOOTH=
+NO_CVS=
+NO_CXX=
+NO_FORTRAN=
+NOGAMES=
+NO_GCOV=
+NO_GDB=
+NO_HESIOD_LIBC=
+NOHTML=
+NO_I4B=
+NOINET6=
+NOINFO=
+NO_IPFILTER=
+NO_KERBEROS=
+NOLIBTHR=
+NO_LPR=
+NOMAN=
+NO_MODULES=
+NO_OBJC=
+NO_PF=
+NOPROFILE=
+NORADIUS=
+NO_RESCUE=
+NO_SENDMAIL=
+NO_SHAREDOCS=
+NO_TOOLCHAIN=
+NO_USB=
+NO_VINUM=
+#NO_YP_LIBC=
 
 # If this macro is defined, UFS volume labels are used on
 # the flash image to avoid hardcoding device names.
-#WITH_GEOM_VOL=	yes
+#WITH_GEOM_VOL=
  
 # The configuration slice can be primed by copying a master
 # directory tree