Updating textproc/p5-XML-Stream from 1.22nb1 to 1.23

pkgsrc changes:
- Add license definition
- Adjust dependencies

Upstream changes:
1.23
====
  - RT#17484 Handle servers which re-use stream ID
  - RT#18711 Update link to XML Streams doc
  - RT#12977 Require perl >= 5.8.0
  - RT#19415 Use jabber.org for tests
  - RT#21932 Fix authname for Google Talk SASL auth
  - RT#39098 Make dependencies more explicit
  - RT#24817 Merge and massage of toddr's SASL fix
  - RT#36864 Fake select on filehandles on win32
  - RT#31215 Test and fix for XML node copying issue
  - RT#17325 Fix and test for infinite loop on quotes

(sno)