package/kismet: bump to version 2020-09-R3

package/kismet: bump to version 2020-09-R3

- Drop all patches (not needed anymore)
- Update help message of Config.in: kismet does not support only WiFi
  but also Bluetooth, SDR ...
- Remove ncurses dependency
- libnl is now optional
- Drop --with-netlink-version (not available anymore)
- Add protobuf, protobuf-c, sqlite and zlib mandatory dependencies
- kismet_client and kismet_drone have been dropped since version 2019-04-R1
- Select libmicrohttpd for kismet_server
- Add optional libusb and lm-sensors dependencies
- Use --{enable,disable}-{libcap,pcre} options
- Use the new LICENSE file

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>