We need to pass a string back along with the http status codes

The dirserver gives back a status code (e.g. 403) plus a string. We need to make that string configurable based on what the error/status actually is, and have the client parse out the string.

Currently, there's no distinction between "you're an unverified server" and "your clock is extremely wrong". So people don't know there's anything to fix.

In addition, since we do accept unverified servers now, we should be giving back a "200 unverified server accepted" rather than a 403.

[Automatically added by flyspray2trac: Operating System: All]