netcfg v2.1 is mostly a bug fix release, however there are some important changes and new features.
- Remove driver specific hacks/quirks. They now need to be enabled manually using the QUIRKS=() array.
- auto-wireless has been moved from net-profiles to a separate daemon net-auto.
- A new option (IWCONFIG) to run iwconfig with set arguments before connecting
- Various minor fixes
Details can be found on the wiki for all these options
Development details for netcfg can also be found on the wiki