- No need to open with write permission to dump it

git-svn-id: svn://munin-monitoring.org/munin/trunk@4161 47311dc8-50f3-0310-b975-824c5c5ab7df

contrib/dump_db

@@ -10,7 +10,7 @@ my $db_file = shift;
 my %hash;
 use Fcntl;   # For O_RDWR, O_CREAT, etc.
 use DB_File;
-tie(%hash, 'DB_File', $db_file, O_RDWR) or die "$!";
+tie(%hash, 'DB_File', $db_file, O_RDONLY) or die "$!";
 
 for my $key (sort keys %hash) {
 	my $value = $hash{$key};