update util/check-changes to handle non master branched (util/check-changes master=0 CHANGES)

(cherry picked from commit 88a22020)

CHANGES

+4910.	[func]		Update util/check-changes to work on release branches.
+			[GL #113]
+
 4909.	[bug]		named-checkconf did not detect in-view zone collisions.
 			[GL #125]
 

util/check-changes

@@ -15,13 +15,13 @@
 # OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 # PERFORMANCE OF THIS SOFTWARE.
 
-# $Id$
-
 eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
     if $running_under_some_shell;
 			# this emulates #! processing on NIH machines.
 			# (remove #! line above if indigestible)
 
+$master = 1;
+
 eval '$'.$1.'$2;' while $ARGV[0] =~ /^([A-Za-z_0-9]+=)(.*)/ && shift;
 			# process any FOO=bar switches
 
@@ -32,9 +32,15 @@ $change = 0;
 $status = 0;
 
 line: while (<>) {
-    ($Fld1,$Fld2) = split(' ', $_, 9999);
+    ($Fld1,$Fld2,$Fld3,$Fld4) = split(' ', $_, 9999);
+    $change = 0 if (!$master && $Fld1 eq "---" &&
+		    $Fld3 eq "released" && $Fld4 eq "---");
     if ($Fld1 =~ /^[1-9][0-9]*\.$/ && $Fld2 =~ /^\[.*\]$/) {
-	if ($change != 0 && $Fld1 + 1 != $change) {
+	if ($change != 0 && $Fld1 >= $change) {
+	    print 'bad change number', $Fld1;
+	    $status = 1;
+	}
+	if ($master && $change != 0 && $Fld1 + 1 != $change) {
 	    print 'bad change number', $Fld1;
 	    $status = 1;
 	}