Fix up getTempSigninUrl option so that it uses https when appropriate and http otherwise.
Fix up getTempSigninUrl option so that it uses https when appropriate and http otherwise.

OpeningDesign/SketchSpace,jds2001/Etherpad-development,mozilla/pad,mozilla/pad,sciflow/pad,sciflow/pad,square/pad,sciflow/pad,OpeningDesign/SketchSpace,mozilla/pad,ether/pad,ether/pad,square/pad,floatingatoll/pad,jds2001/Etherpad-development,OpeningDesign/SketchSpace,floatingatoll/pad,square/pad,mozilla/pad,square/pad,mozilla/pad,floatingatoll/pad,OpeningDesign/SketchSpace,sciflow/pad,OpeningDesign/SketchSpace,floatingatoll/pad,jds2001/Etherpad-development,ether/pad,ether/pad,floatingatoll/pad,ether/pad