Auto-renew is being set TRUE when submitting online membership signup when the box is NOT checked

• • • RECENT REGRESSION in master ***
      Pretty sure this is related to some recent changes.

Steps:

• Membership type 'Foobar' has 'auto-renew' optional
• Add 'Foobar' to sample contribution page id =2, with auto-renew 'Offered'
• Use 'Dummy' processor (as in sample page)
• Signup for 'Foobar' membership and leave " Please renew my membership automatically." UNCHECKED
• Submit 'Main'
• Confirmation page shows (regardless of whether box is checked or not):
  "I want this membership to be renewed automatically every 1 year(s)."

Repeated above after changing contribution page Membership tab settings to "Not offered" for that membership type

• In this case there is NO checkbox on Main.php form.
• After submit, Confirmation page still shows auto-renew has been set to TRUE