I generally steer towards using a 'Constants' package for such things.

package SUP::ServerConstants;

use strict;
use vars qw/@EXPORT @EXPORT_OK/;
require Exporter;
use base qw/ Exporter /;
use Data::Dumper;
@EXPORT = qw/SERVER_NAME MYSQL_PORT SERVER_ID/;
@EXPORT_OK = qw/HTTP_PROXY PATH_TO_BINARIES/;

use constant SERVER_NAME => 'http://FOO';
use constant MYSQL_PORT => '3308';
use constant SERVER_ID => '44';
use constant HTTP_PROXY => '';
use constant PATH_TO_BINARIES = '/var/foo';
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Then to access them in your script you would have something like...

#!/usr/bin/perl -w

use strict;
use SUP::ServerConstants qw/PATH_TO_BINARIES/;

print PATH_TO_BINARIES;
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