Multiple changes. - Start converting from from the old 'config' file format where applicable. - Port the ezmlm address hashing algorithm for fast email lookups - Add subscription and unsubscription for primary and behavioral dirs - Add a safety check for writes to the list directory

First round of modernizing after a long absence. Much work to be done.

Updated to new build system.

Removing docs external

Switching to new build system

Trying to fix the build again.