Update to use the new xxnet crypto repo

Makefile

api/client.go

api/client_test.go

api/ndf_test.go

api/notifications_test.go

api/private.go

api/private_test.go

api/register.go

bindings/client_test.go

cmd/root.go

globals/version_vars.go

go.mod

go.sum

rekey/rekey_test.go

user/session.go

user/session_test.go

user/sessionv1.go

version_vars.go.bak