Options spring cleanup:

- Add and document the KVM and KVM_SUPPORT options that
are needed for the ifmcstats(3) makefile
- Garbage collect unused variables
- Add missing inclusion of bsd.own.mk where needed

Approved by: kan (mentor)
Reviewed by: ru

lib/libarchive/test/Makefile

@@ -48,7 +48,6 @@ SRCS= ${TESTS}					\
 
 CLEANFILES+= list.h
 
-MK_MAN=no
 NO_MAN=yes
 
 PROG=libarchive_test

share/mk/bsd.own.mk

@@ -325,6 +325,7 @@ WITH_IDEA=
     IPFILTER \
     IPX \
     KERBEROS \
+    KVM \
     LIB32 \
     LIBPTHREAD \
     LIBTHR \
@@ -449,6 +450,7 @@ MK_GDB:=	no
     INET6 \
     IPX \
     KERBEROS \
+    KVM \
     PAM
 .if defined(WITH_${var}_SUPPORT) && defined(WITHOUT_${var}_SUPPORT)
 .error WITH_${var}_SUPPORT and WITHOUT_${var}_SUPPORT can't both be set.

sys/modules/ip_mroute_mod/Makefile

@@ -1,5 +1,7 @@
 # $FreeBSD$
 
+.include <bsd.own.mk>
+
 .PATH: ${.CURDIR}/../../netinet ${.CURDIR}/../../netinet6
 
 KMOD=	ip_mroute
@@ -8,7 +10,7 @@ SRCS=	ip_mroute.c
 SRCS+=	opt_inet.h opt_mac.h opt_mrouting.h
 SRCS+=	opt_inet6.h
 
-.if !defined(MK_INET6_SUPPORT) || ${MK_INET6_SUPPORT} != "no"
+.if ${MK_INET6_SUPPORT} != "no"
 SRCS+=	ip6_mroute.c
 .endif
 
@@ -17,7 +19,7 @@ opt_inet.h:
 	echo "#define INET 1" > ${.TARGET}
 opt_mrouting.h:
 	echo "#define MROUTING 1" > ${.TARGET}
-.if !defined(MK_INET6_SUPPORT) || ${MK_INET6_SUPPORT} != "no"
+.if ${MK_INET6_SUPPORT} != "no"
 opt_inet6.h:
 	echo "#define INET6 1" > ${.TARGET}
 .endif

tools/build/options/WITHOUT_KVM

@@ -0,0 +1,5 @@
+.\" $FreeBSD$
+Set to not build the
+.Nm libkvm
+library as a part of the base system.
+.Sy "The option has no effect yet."

tools/build/options/WITHOUT_KVM_SUPPORT

@@ -0,0 +1,4 @@
+.\" $FreeBSD$
+Set to build some programs without optional
+.Nm libkvm
+support.

usr.bin/Makefile

@@ -9,8 +9,6 @@
 # Moved to secure: bdes
 #
 
-.include <bsd.own.mk>
-
 SUBDIR=	alias \
 	apply \
 	asa \

usr.sbin/ifmcstat/Makefile

@@ -1,17 +1,19 @@
 #	@(#)Makefile	8.1 (Berkeley) 6/5/93
 # $FreeBSD$
 
+.include <bsd.own.mk>
+
 PROG=	ifmcstat
 MAN=	ifmcstat.8
 BINMODE= 550
 
 WARNS?=	2
 
-.if !defined(MK_INET6_SUPPORT) || ${MK_INET6_SUPPORT} != "no"
+.if ${MK_INET6_SUPPORT} != "no"
 CFLAGS+=-DINET6
 .endif
 
-.if !defined(MK_KVM_SUPPORT) || ${MK_KVM_SUPPORT} != "no"
+.if ${MK_KVM_SUPPORT} != "no"
 CFLAGS+=-DWITH_KVM
 DPADD=	${LIBKVM}
 LDADD=	-lkvm