[Dovecot] Solaris problem & exim. Please ignore it.

[Stephen Usher]

Please ignore my previous question.. as it turns out it's a bug/feature of 
fprintf(3C) and sockets under Solaris.

Exim was using fprintf to output the AUTH string and for some unknown reason 
it was hanging, possibly because the input buffer on the file stream wasn't 
empty or something.

After modifying the Exim's dovecot authentication plug-in to use write(2) 
instead of fprintf(3C) it miraculously worked!

Steve
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