* extend build.sh
- add option flags;
- among others, flag --auto allows executing
script in a non-interactive mode, where all
unset options are defaulted automaticaly;
- add help/usage;
* post-review: --pulse-audio -> --pulseaudio
* post-review: do not install config by default
This patch enables support for nl80211. In case the libnl-genl-3.0
library isn't found, it will fall back to Wext instead.
The library to use can also be manually set with the CMake option
WITH_LIBNL.
The Wireless-Extensions (WE or Wext) are deprecated and long replaced
by cfg80211.
Although Wext isn't used by WiFi drivers anymore, CFG80211_WEXT allows
old tools to communicate with modern drivers by providing a wrapper
API.
