p5-sysadm-install: requires p5-expect to use provided function hammer()

[dbevans (David B. Evans)]

A dependency on p5-expect seems to be required for full functionality.

Configure warns as follows:

DEBUG: Assembled command: 'cd "/opt/local/var/macports/build/_opt_macports_trunk_dports_perl_p5-sysadm-install/p5.20-sysadm-install/work/Sysadm-Install-0.44" && /opt/local/bin/perl5.20 Makefile.PL INSTALLDIRS=vendor CC="/usr/bin/clang" LD="/usr/bin/clang"'
DEBUG: Executing command line:  cd "/opt/local/var/macports/build/_opt_macports_trunk_dports_perl_p5-sysadm-install/p5.20-sysadm-install/work/Sysadm-Install-0.44" && /opt/local/bin/perl5.20 Makefile.PL INSTALLDIRS=vendor CC="/usr/bin/clang" LD="/usr/bin/clang" 
WARNING: Expect not found.
         You won't be able to use hammer().
         Install Expect from CPAN later if you want to.
Checking if your kit is complete...
Looks good

Tests don't seem to cover this functionality but without p5.20-expect active

$ perl5.20
use Sysadm::Install qw(:all);
hammer("man", "portfile");
__END__
Can't locate Expect.pm in @INC (you may need to install the Expect module) (@INC contains: /opt/local/lib/perl5/site_perl/5.20/darwin-thread-multi-2level /opt/local/lib/perl5/site_perl/5.20 /opt/local/lib/perl5/vendor_perl/5.20/darwin-thread-multi-2level /opt/local/lib/perl5/vendor_perl/5.20 /opt/local/lib/perl5/5.20/darwin-thread-multi-2level /opt/local/lib/perl5/5.20 .) at /opt/local/lib/perl5/vendor_perl/5.20/Sysadm/Install.pm line 1385.