Fix for config-finder.t so cygwin install passes.
Fix for config-finder.t so cygwin install passes.

This generalizes the set_up_global function to work on anything; this
means that this test passes under both standard Windows (Strawberry)
Perl and cygwin perl.

h3xx/ack2,packy/ack2,karenetheridge/App-Ack,karenetheridge/App-Ack,shlomif/ack2,openstrike/ack2,dagolden/ack2,karenetheridge/App-Ack,gregory-nisbet/ack2,gregory-nisbet/ack2,h3xx/ack2,karenetheridge/App-Ack,jamessan/ack2,gregory-nisbet/ack2,karenetheridge/App-Ack,gregory-nisbet/ack2,openstrike/ack2,h3xx/ack2,openstrike/ack2,jamessan/ack2,packy/ack2,petdance/ack2,petdance/ack2,shlomif/ack2,packy/ack2,shlomif/ack2,gregory-nisbet/ack2,packy/ack2,dagolden/ack2,packy/ack2,gregory-nisbet/ack2,jamessan/ack2,packy/ack2,dagolden/ack2,shlomif/ack2,dagolden/ack2,dagolden/ack2,jamessan/ack2,shlomif/ack2,dagolden/ack2,gregory-nisbet/ack2,openstrike/ack2,petdance/ack2,petdance/ack2,openstrike/ack2,packy/ack2,openstrike/ack2,karenetheridge/App-Ack,jamessan/ack2,openstrike/ack2,karenetheridge/App-Ack,shlomif/ack2,karenetheridge/App-Ack,h3xx/ack2,h3xx/ack2,packy/ack2,petdance/ack2,openstrike/ack2,gregory-nisbet/ack2,h3xx/ack2,petdance/ack2,h3xx/ack2,h3xx/ack2,petdance/ack2,jamessan/ack2,petdance/ack2