Add blacklistd.conf manpage

Install the blacklistd.conf man page, missed in the original commit.

Submitted by:	Herbert J. Skuhra ( herbert at mailbox.org )
Reviewed by:	rpaulo
Approved by:	rpaulo
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D6702

tools/build/mk/OptionalObsoleteFiles.inc

@@ -449,6 +449,7 @@ OLD_FILES+=usr/share/man/man3/blacklist_sa.3.gz
 OLD_FILES+=usr/share/man/man3/blacklist_sa_r.3.gz
 OLD_FILES+=usr/share/man/man8/blacklistctl.8.gz
 OLD_FILES+=usr/share/man/man8/blacklistd.8.gz
+OLD_FILES+=usr/share/man/man8/blacklistd.conf.5.gz
 .endif
 
 .if ${MK_BLUETOOTH} == no

usr.sbin/blacklistd/Makefile

@@ -6,7 +6,7 @@ BLACKLIST_DIR=${SRCTOP}/contrib/blacklist
 PROG=	blacklistd
 SRCS=	blacklistd.c conf.c run.c state.c support.c internal.c \
 	sockaddr_snprintf.c pidfile.c strtoi.c popenve.c
-MAN=	blacklistd.8
+MAN=	blacklistd.8 blacklistd.conf.5
 
 LDFLAGS+=-L${LIBBLACKLISTDIR}
 LIBADD+= blacklist util