dovecot - Nov 2007 - Request for variable unique to each server?

I've been looking for a variable I can use in my dovecot.conf within the
INDEXsetting so I can have one index dir per imap server on NFS.  I've been
looking at
http://wiki.dovecot.org/Variables but no variable seems to contain something
like
server hostname, and I've been hunting for the variable expansion code in
dovecot
but haven't been able to find it.  %l (local IP) won't help me because
when using
our load balancer, %l is the same IP on all of my servers.  %r is close to
useful
but having a local webmail server on each server means I'd end up with
127.0.0.1
being shared (also I would end up with one directory per unique user/clientIP
combo).

Is there a variable that holds the server hostname or something else unique per
server,
or could one be added, or could someone point me at the code?  Thanks.

On Sat, 2007-11-10 at 09:12 -0500, Adam McDougall wrote:
> Is there a variable that holds the server hostname or something else unique
per server,
> or could one be added, or could someone point me at the code?  Thanks.
Well, the code would in two places:

src/auth/auth-request.c auth_request_get_var_expand_table()
src/master/mail-process.c get_var_expand_table()

You could add a new variable that uses my_hostname variable from
hostpid.h. I'm not sure if I should add this to standard variables.
These one letter variables are beginning to run out. Maybe v2.0 should
have longer $variable names..

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On Sat, Nov 10, 2007 at 05:30:08PM +0200, Timo Sirainen wrote:

  On Sat, 2007-11-10 at 09:12 -0500, Adam McDougall wrote:
  > Is there a variable that holds the server hostname or something else
unique per server,
  > or could one be added, or could someone point me at the code?  Thanks.
  
  Well, the code would in two places:
  
  src/auth/auth-request.c auth_request_get_var_expand_table()
  src/master/mail-process.c get_var_expand_table()
  
  You could add a new variable that uses my_hostname variable from
  hostpid.h. I'm not sure if I should add this to standard variables.
  These one letter variables are beginning to run out. Maybe v2.0 should
  have longer $variable names..
  
Thanks!  Got that working as a local patch, which I am satisfied with if
you don't add an official one.  I just quickly picked a letter that looked
unused (%q)
so thats what it is when you see it in configs I post ;)