Merge pull request #6077 from edx/will/enable-logistration

common/djangoapps/external_auth/login_and_register.py

common/djangoapps/external_auth/tests/test_ssl.py

common/djangoapps/student/helpers.py

common/djangoapps/student/tests/test_login.py

common/djangoapps/student/views.py

common/djangoapps/third_party_auth/pipeline.py

common/djangoapps/third_party_auth/tests/specs/base.py

common/test/acceptance/tests/lms/test_lms.py

lms/djangoapps/courseware/features/login.feature

lms/djangoapps/courseware/features/login.py

lms/djangoapps/courseware/features/signup.feature

lms/djangoapps/courseware/features/signup.py

...angoapps/courseware/tests/test_registration_extra_vars.py

lms/djangoapps/instructor/enrollment.py

lms/djangoapps/instructor/views/legacy.py

lms/djangoapps/student_account/helpers.py

lms/djangoapps/student_account/test/test_views.py

lms/djangoapps/student_account/views.py

lms/templates/courseware/mktg_course_about.html

lms/urls.py