Fix enrolment on non-standard ports.

This isn't the right jira issue, but jira is down...

Jira issue: WP-852
Merge pull request #16 from jplyle/enrolment-port-fix

Fix enrolment on non-standard ports.
Remove stale invitation tokens from a personal zone hub

Add a function to delete invitation tokens that have expired.

Jira issue: WP-852
Merge pull request #17 from jplyle/purge-old-invitations

Remove stale invitation tokens from a personal zone hub
Make the PZH send it's web server address with certificates

This is useful for the invitations work (or will be, at least) when
redirecting to the user's PZH.

Jira issue: WP-852
Fixed PZP revocation and removal

Bug fixes only.

Jira issue: WP-773
Clean up comments

Jira issue: WP-773
Test fix - add nickname to user object.

Jira issue: WP-773
Second fix for testing: add nickname to addPzh().

Jira issue: WP-773
Fix tests

Jira issue: WP-773
Merge pull request #20 from jplyle/fix-revocation-again

Fix revocation again
Merge pull request #18 from jplyle/give-pzp-web-info

Make the PZH send its web server address with certificates