Add a pkg_version variable so that it's possible to run portsversion instead

of pkg_version in periodic/weekly/400.status-pkg.

etc/defaults/periodic.conf

@@ -201,6 +201,7 @@ weekly_noid_dirs="/"					# Look here
 
 # 400.status-pkg
 weekly_status_pkg_enable="NO"				# Find out-of-date pkgs
+pkg_version=pkg_version					# Use this program
 
 # 999.local
 weekly_local="/etc/weekly.local"			# Local scripts

etc/periodic/weekly/400.status-pkg

@@ -16,7 +16,7 @@ case "$weekly_status_pkg_enable" in
 	echo ""
 	echo "Check for out of date packages:"
 
-	rc=$(pkg_version -v |
+	rc=$(${pkg_version:-pkg_version} -v |
 	    sed -n -e 's/^\([^ ]*\)  *<  */  \1 /p' \
 		-e '/^[^ ]*-\([^ ]*\)  *\* *multiple versions.*[ ,]\1[,)].*/d' \
 		-e 's/^\([^ ]*\)  *\* *multiple versions.*\((.*\)/  \1 needs updating \2/p' \

share/man/man5/periodic.conf.5

@@ -636,6 +636,20 @@ Set to
 if you want to use
 .Xr pkg_version 1
 to list installed packages which are out of date.
+.It Va pkg_version
+.Pq Vt string
+When
+.Va weekly_status_pkg_enable
+is set to
+.Dq YES ,
+this variable specifies the program that is used to determine the out of
+date packages.
+If unset, the
+.Xr pkg_version 1
+program is used.
+As an example, this variable might be set to
+.Dq portversion
+if the portupgrade port has been installed.
 .It Va weekly_local
 .Pq Vt str
 Set to a list of extra scripts that should be run after all other