Log Message:
Update to 0.43. From the changelog:

-Added per-post sender confirmation patch from Tullio Andreatta.
 See the documentation for ezmlm-make -y for details.
-Changed all example domain names in text files to the RFC 2606 mandated
 example.com domain name.
-Several documentation and comment fixes.  Thanks Tullio Andreatta.
-Added conf-sub control file, used to choose which subscriber
 mechanism to use.  This replaces the "make std/mysql/pgsql" mechanism.
 Adapted from patch by Tullio Andreatta.
-Got rid of the frivolous uses of /bin/sh to exec ezmlm-send.
-Always reject bounce messages in ezmlm-reject.
-Substitute <#r#> in (un)subscribe confirm messages with just the local
part of the reply address (for web-based confirmation).