[Dovecot] disable zlib via config to allow per mailbox compression level

[Kui Zhang]

Hello

Dovecot v2.0.5

  zlib_save_level = 6 # 1..9
  zlib_save = gz # or bz2

Is there a config option to disable zlib, even if above config are in
place? If so please provide an example.

If no, would it be possible to add one? Like if  zlib_save_level = 0
disable zlib. So one can configure per mailbox compression level via
sql database.

KuiZ

Thanks