Allow multiple wildcards in providers.xml; add hotmail domains

* Change handling of the providers.xml file to allow asterisk
  as a placeholder for an individual domain name part
  (the previous behavior was a very greedy wildcard)
* Add hotmail aliases using the new scheme
* Update unit tests

Bug: 5318329
Change-Id: I73a0dfcb956830b18c5460a1b3ddfc58459d08c9
3 files changed