[bug#66935] [PATCH 4/4] services: dovecot: Fix incorrect type for ssl? field.

[Herman Rimm]

Guix pull fails with the [PATCH 4/4] commit. It could be because 'ssl? #t' is 
still used for the inet-listeners in the default dovecot-configuration. By the 
way, I see that the "required" value can be used for the ssl dovecot core 
setting, but for the inet-listener this is not specified: 
https://doc.dovecot.org/configuration_manual/service_configuration/?highlight=inet_listener#ssl.
 I think changing the ssl? option type from boolean to string should be done 
for all boolean valued options simultaneously in a separate patch, if at all. 
Also, can you post any amended patch series in chronological order so it's 
easier to apply?

Cheers,
Herman Rimm