Revert "style.Makefile(5): update recommendations"

This has not been reviewed yet - revert the change so it can be reviewed
properly first.

This reverts commit 68aebfa28a.

share/man/man5/style.Makefile.5

@@ -28,7 +28,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd October 29, 2026
+.Dd October 29, 2025
 .Dt STYLE.MAKEFILE 5
 .Os
 .Sh NAME
@@ -70,12 +70,9 @@ order is:
 .Va SRCS
 .Va WARNS
 .Va CSTD
-.Va CXXSTD
 .Va CFLAGS
-.Va CXXFLAGS
 .Va DPADD
-.Va LDADD
-.Va LIBADD .
+.Va LDADD .
 The general
 .Dq build
 order is:
@@ -83,12 +80,9 @@ order is:
 .Va SRCS
 .Va WARNS
 .Va CSTD
-.Va CXXSTD
 .Va CFLAGS
-.Va CXXFLAGS
 .Va DPADD
 .Va LDADD
-.Va LIBADD
 .Va INCS
 .Va FILES
 .Va LINKS
@@ -235,22 +229,13 @@ To not build the
 .Dq foo
 part of the base system,
 use
-.Va WITHOUT_FOO
-or
-.Dv MK_FOO=no ,
+.Va NO_FOO ,
 not
-.Va NO_FOO
-or
 .Va NOFOO .
-The latter are reserved for the
-.Fx
-Ports Collection.
 .It
 To optionally build something in the base system,
 spell the knob
 .Va WITH_FOO
-or
-.Dv MK_FOO=yes ,
 not
 .Va WANT_FOO
 or