2.1

• Fix a bug in the configuration file parser that could lead to the data structures not being filled correctly in some configurations.
• Pedantic corrections to more strictly comply with the C standard.

2.0

• Change configuration file format. THIS BREAKS BACKWARDS COMPATIBILITY, although it is not difficult at all to convert existing configurations. See the packaged UPGRADING file for more information. In short: add a [dyndns] line to the top of your configuration file, and %s/^hostname=/hosts=/g (change all hostname= lines to hosts=).
• Add support for Namecheap DNS service.
• Allow most options previously requiring command line switches to be specified in the configuration file.
• Be much more flexible about whitespace in the configuration file.

1.16

• Support parsing of configuration files passed in through standard input.
• Parse configuration files before forking into the background as a daemon.
• Change license to GPL3.