Multiple attributes (of logical devices) are rearranged into an array

reference when the second attribute with the same name is encountered.

Apparently, it is possible to have zero or even more than one physical
device as "Dedicated Hot-Spare", as documented in [1].  Maybe this is
the only attribute that can have multiple occurances.  This modification
now records multiple occurances as an array reference.

* [1] https://github.com/kumy/Parse-Arcconf/issues/4

lib/Parse/Arcconf.pm

@@ -206,7 +206,15 @@ sub parse_config_fh
 		} elsif ($line =~ /^\s+([^:]+)\s+:\s+(.*)$/) {
 		  my ($an, $av)= ($1, $2);
 		  $an=~ s/\s*$//;
-			$ctrl->{'logical drive'}{$current_logical_drive}{$an} = $av;
+			if (exists($ctrl->{'logical drive'}{$current_logical_drive}{$an})) {
+			  if (ref ($ctrl->{'logical drive'}{$current_logical_drive}{$an}) eq 'ARRAY') {
+			    push (@{$ctrl->{'logical drive'}{$current_logical_drive}{$an}} => $av);
+			  } else {
+			    $ctrl->{'logical drive'}{$current_logical_drive}{$an} = [$ctrl->{'logical drive'}{$current_logical_drive}{$an}, $av];
+			  }
+			} else {
+			  $ctrl->{'logical drive'}{$current_logical_drive}{$an} = $av;
+			}
 		} elsif ($line =~ /^\s+-+$/) {
 			my $cat = <$fh>;
                         $cat =~ s/^\s+(\S.*\S+)\s+/$1/;