Size limitation on login realms

[Mordur Ingolfsson]

Dear list,

I have a Cyrus imap 2.2.13  running on Debian serving 1500 users from 
358 domains, meaning 333 login realms. Today, when I was going to add 
login realm nr. 359 all hell broke loose and my logs filed up with this 
here message:

Nov  3 09:38:20 mail cyrus/lmtpunix[7935]: FATAL: invalid option name on 
line 188 of configuration file /etc/imapd.conf

It so happens, that the line containing the option loginrealms: is line 
187 in imapd.conf, so I have probably reached a size limit for the 
loginrealms option and the domains in exess of this size limit are 
somehow considered to be on the next line in the file, line 188.

these are the statistics for my loginrealms line:

Lines: 1
Words:  333
Characters: 3711

Have I reached an unmovable barrier here, or is there a way around this? 
I would really like to know, because the setup is working very well 
except for this new problem.

Thanks,

Mordur Ingolfsson
1984 ehf