[Dovecot] APOP and CRAM-MD5 in checkpassword module

[Max A.]

> Still a bit more fixes. My coding TODO list is again empty. 
Whether it is possible to add APOP and CRAM-MD5 in the 
checkpassword-module? Original qmail-popup is able APOP, and smtp-auth 
patch (http://www.fehcom.de/qmail/smtpauth.html) can use CRAM-MD5, 
accordingly, vckpw from vpopmail understands both these of a method. 
Very much would be desirable, that these two methods were in dovecot (in 
chackpassword-module).


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М. Alhimenko.