Conditionalize dependencies for moudules included in perl 5.8
Make dependencies on modules included in the perl 5.8
distribution conditional on the perl version installed.
While I'm here, remove SITE_PERL and MAN(3)PREFIX.
17 + 29 + 234 = 280 PRs. It's about time he starts doing the work himself!
Submitted by: Erwin Lansing <email@example.com>