SOCIAL_AUTH_SAML_SECURITY_CONFIG["authnRequestsSigned"] override in
settings.py in a previous commit wouldn't work on servers old enough to
not have the SAML settings in their settings.py - due to
SOCIAL_AUTH_SAML_SECURITY_CONFIG being undefined.
This commit fixes that.
This legacy cross-realm bot hasn't been used in several years, as far
as I know. If we wanted to re-introduce it, I'd want to implement it
as an embedded bot using those common APIs, rather than the totally
custom hacky code used for it that involves unnecessary queue workers
and similar details.
Backported to the 2.1.x branch.
These are leftovers from where we had default settings in the
settings.py file. Now that the files are separate those references to
"below" are not correct.
