* Update Get and getPrimitive to correctly handle nil and error values

* Return empty slice on zero length decode result

Fixes #5026

* Fix expiration handling to not leak goroutines

* Apply feedback

* Fixied issue 5497

* Cleaned up the policy

Add licensing to the UI 

add integration tests for the ui tutorial

Fixes some sources of user strife

Fixes #5481

* Set allowed OIDs to any value when generaing a CA.

Also, allow utf-8 in addition to utf8 as the OID type specifier, and
allow `*` to specify any OID of a supported type.

* Update PKI docs

Running 'vault auth' with no parameters was panicking:

panic: assignment to entry in nil map
	github.com/hashicorp/vault/command/login.go:255 +0xdee

Now it will show help.