Belated test for RT 91540
Remove carp "for old Makefiles written pre 5.00" (ie pre-2002)
Move to MM_Any post_constants post_initialize postamble
Change confusing private method name "skipcheck"
Minor tidyup
Breakup MakeMaker->new: check_min_perl_version method
Breakup MakeMaker->new: check_prereqs method
Breakup MakeMaker->new: clean_versions method
Breakup MakeMaker->new: setup_MY method
Breakup MakeMaker->new: iterate over @init_methods
Breakup MakeMaker->new: generate_makefile method
Breakup MakeMaker->new: run_CONFIGURE method
Breakup MakeMaker->new: check_PREREQ_FATAL method
Breakup MakeMaker->generate_makefile: makefile_preamble