Add a clean_agrees_to_tos() validator that requires "Yes" if ToS exists.
Also, more user_logic.logic => user_logic fixes. If you are going to import
"as", you might as well make the renaming worthwhile. Maybe we need to add
a section on "import ... from ... as ..." in the style guide?
Patch by: Todd Larsen
Review by: to-be-reviewed
# Please sort this file in alphabetical order by last (given) name.
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"Mario Ferraro" <fadinlight@gmail.com>
"Todd Larsen" <tlarsen@google.com>
"Chen Lunpeng" <forever.clp@gmail.com>
"Sverre Rabbelier" <sverre@rabbelier.nl>
"Lennard de Rijk" <ljvderijk@gmail.com>
"Pawel Solyga" <pawel.solyga@gmail.com>