Broken link in: Support for the iwconfig command might be architecture-specific. If the command is not available, please follow the instructions of the linux-wlan-ng project.
Link has been removed since the website no longer exists. I've updated the text with something that works better.
Issue has been resolved. Noted the specific architectures for the net-wireless/wireless-tools package (iwconfig command). https://wiki.gentoo.org/index.php?diff=356694&oldid=212156