[dovecot] rpm and srpm for dovecot

hi, I put an rpm and srpm for dovecot on:

http://www.dulug.duke.edu/~skvidal/RPMS/

They are made under rhl 7.3 - should build on 8.x I'd bet.

I added an init script to start up imap-master

I've done exactly ZERO testing on these and I'd welcome some feedback, thanks.

-sv