dovecot - Feb 2012 - Move templates args to override_fields setting?

After upgrading from 2.0.x to 2.1.x I get a lot of:
Feb 18 18:18:12 postamt dovecot: auth-worker(31443): Warning: userdb passwd:
Move templates args to override_fields setting

OK, it's just a warning, but how do I fix that in a 2.0.x compatible
way?

The only place userdb is used is in this contaxt:

# for user*masteruser logins
passdb {
  args = /usr/local/etc/dovecot/dovecot.masteruser
  driver = passwd-file
  master = yes
}
      
# User via passwd
userdb {
  driver = passwd
  args = cache_key=%u
}
	    
-- 
Ralf Hildebrandt
  Gesch?ftsbereich IT | Abteilung Netzwerk
  Charit? - Universit?tsmedizin Berlin
  Campus Benjamin Franklin
  Hindenburgdamm 30 | D-12203 Berlin
  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
  ralf.hildebrandt at charite.de | http://www.charite.de

On 18.2.2012, at 19.25, Ralf Hildebrandt wrote:
> After upgrading from 2.0.x to 2.1.x I get a lot of:
> Feb 18 18:18:12 postamt dovecot: auth-worker(31443): Warning: userdb
passwd: Move templates args to override_fields setting
> 
> OK, it's just a warning, but how do I fix that in a 2.0.x compatible
> way?
..
> # User via passwd
> userdb {
>  driver = passwd
>  args = cache_key=%u
> }
Remove the cache_key, because 1) it's already %u by default and 2) cache_key
setting has never existed for passwd.