Don't allow IPsec mobile clients user auth source to not be a RADIUS server if the phase1 auth method is EAP-RADIUS. Properly handle selection of multiple RADIUS servers when using EAP-RADIUS. Fixes #5219.
Related issues
Todo #5219: EAP-RADIUS selection for IKEv2 Mobile IPsec should warn if the selected authentication backend is not a RADIUS server.
Don't allow IPsec mobile clients user auth source to not be a RADIUS server if
the phase1 auth method is EAP-RADIUS. Properly handle selection of multiple
RADIUS servers when using EAP-RADIUS. Fixes #5219.