Enabling IDLE with murder configuration

[Jean-Christophe Delaye]

Hi,

I am testing IDLE feature in our murder configuration (2 murder hosts + 
4 backend servers).

I understand I have to compile imapd with --enable-idled option.
But I wonder on which server(s) i have to start the idled daemon in 
cyrus.conf ? on murder frontend only or imap backend only or both ?
Of course mail clients are all connected to murder frontends only.

Thank you,

J-Christophe.