[idp] [auth_ssl] Add support of the X509 authn context.
[idp] [auth_ssl] Add support of the X509 authn context.

incuna/authentic,incuna/authentic,BryceLohr/authentic,incuna/authentic,pu239ppy/authentic2,BryceLohr/authentic,pu239ppy/authentic2,incuna/authentic,pu239ppy/authentic2,BryceLohr/authentic,adieu/authentic2,adieu/authentic2,pu239ppy/authentic2,incuna/authentic,adieu/authentic2,BryceLohr/authentic,adieu/authentic2