[Web-cyradm] Added EXPERIMENTAL support for username=emailaddress to SVN

[John Thomas]

Please, nobody follow these instructions on a production box.  I know 
little.  Lukasz, would you consider my suggested changes below.

> Hi list,
> 
> I've added experimental support to svn version of web-cyradm. My test
> configuration was:
> cyrus-imapd-2.2.12
> cyrus-sasl-2.1.21
> postfix-2.2.5
> 
> I've changed cyrus admin name in DB from name to name at realm:
> UPDATE accountuser SET username='cyrus at mail.dom.prv' WHERE username='cyrus'
I do not think this step is correct.  I think the user needs to remain 
cyrus in order to have admin rights.

> ######## imapd.conf:
> admins: cyrus
> virtdomains: yes
<snip>

I think virtdomains needs to be userid, otherwise it is impossible to 
log in as cyrus (i.e. you end up logining in as cyrus at example.com or 
cyrus at localdomain, which does not have the authority the cyrus user has).

-- 
Sincerely,
John Thomas