[dev] customsql Auth patch

[Chuck Hagenbuch]

Quoting Joel Vandal <jvandal at infoteck.qc.ca>:

> With this patch, the customsql Auth driver is no more limited to the 
> "authenticate" capability. You can create custom SQL query for add, 
> update, remove and list users.

Committed, thanks!

-chuck

--
Charles Hagenbuch, <chuck at horde.org>
"Here, I brought some cole slaw. It's made from peeeooople! Just kidding."