0.2.0 (2014-09-08)

Core functionality

Changed the way summary emails are sent to recipients. Previously, the summary was sent to the union of all recipients in messages that were a part of the summary. Now, separate summaries are sent to recipients so that they only see the messages that they would normally have been sent.
Added initial support for AUTH, to require authentication from clients connecting to failmail.
Added initial support for STARTTLS, to allow the use of encrypted connections to failmail from clients.
Added the ability to customize the way messages are batched into summary messages, and grouped within summary messages, using template strings.

Added initial support for zero-downtime reloads/upgrades. On receiving SIGUSR1, failmail shuts itself down and hands its listening socket to a new child failmail process (which can be from a newer version) and cleanly shuts down, letting the new process handle all incoming connections without a break in service.
Added options for config files: --config specifies a path to a config file (lines of name = value pairs), and --write-config dumps the current set of command line flags into a config file for editing/later use.
Added handlers for SIGINT and SIGTERM so that the server summarizes and sends messages to the upstream server before terminating.
Added a --pidfile flag, to write a pidfile on startup and remove it on shutdown.
Added a --version flag, to report the version number and exit.

Added more automated tests, and did some work toward end-to-end replay testing.
Added the configure library for reading config files and creating command line flags dynamically from a struct definition, and binding configuration from a file/flags to a struct.
Added to the parse library to support config file parsing.

Initial release.