Dan Poltawski 876fc28255 MDL-56082 auth: minor tweak to login block idp links
No longer set the return url to $SESSION->wantsurl, it doens't make
sense in this context, as the user is probably on the page they want.

Also add a note about this functionality to auth/ugrade.txt
2016-10-18 17:19:03 +01:00
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