Revert "Mark session as "skipped" so no Set-Cookie header is set"
Revert "Mark session as "skipped" so no Set-Cookie header is set"

This reverts commit ef6d89b45cec702c4c6f10b7b0ebb4055e34a65a.

Conflicts:
	lib/sprockets/server.rb

prusswan/sprockets,askl56/sprockets,JuanitoFatas/sprockets,maclover7/sprockets,jeremy/sprockets,sideci-sample/sideci-sample-sprockets,recursecenter/sprockets,bdezonia/sprockets,sferik/sprockets,daniel-rikowski/sprockets,rails/sprockets,tricknotes/sprockets,basecamp/sprockets,orlando/sprockets,masarakki/sprockets,eileencodes/sprockets,prathamesh-sonpatki/sprockets,Andreis13/sprockets,kappezoro/sprockets,guilleiguaran/sprockets,jcoyne/sprockets,byroot/sprockets