[Dovecot] alpha4 and zlib-plugin?

[Jeff A. Earickson]

Hi,
   I saw the zlib-plugin reference in the alpha4 ChangeLog
notes are searched the list for info about it.  The only
reference I found was from Timo back in March 2005.
Questions:

1) Is this going to become a standard part of version 1.0?
2) Any plans or ability to make it read/write to a gzipped
mailbox, or is this possible?  Or will it always be read-only?
3) How does a mailbox get gzipped?  From within dovecot 
somehow, or only by external action?

Jeff Earickson
Colby College