added min version to Net::Server, added File::Path

Build.PL

@@ -8,16 +8,17 @@ my $builder = Module::Build->new(
     dist_author       => 'Alexei Znamensky <russoz@cpan.org>',
     dist_version_from => 'lib/Net/LDAP/SimpleServer.pm',
     requires          => {
-        'Net::Server'           => 0,
-        'Net::LDAP'             => 0.4001,
-        'Net::LDAP::Server'     => 0.43,
-        'UNIVERSAL::isa'        => 0,
-        'File::Spec::Functions' => 0,
-        'Scalar::Util'          => 0,
-        'File::HomeDir'         => 0,
-        'Test::More'            => 0,
-        'version'               => 0,
-        'Carp'                  => 0,
+        'Net::Server'       => 0.91,     # must have a new() method
+        'Net::LDAP'         => 0.4001,
+        'Net::LDAP::Server' => 0.43,     # must support 2-params constructor
+        'UNIVERSAL::isa'    => 0,
+        'Scalar::Util'      => 0,
+        'File::Path'        => 0,
+        'File::Spec'        => 0,
+        'File::HomeDir'     => 0,
+        'Test::More'        => 0,
+        'version'           => 0,
+        'Carp'              => 0,
     },
     add_to_cleanup => ['Net-LDAP-SimpleServer-*'],
 );