wtfd 2.1

Fixes systemd service file (DeviceAccess/DevicePolicy).

wtfd 2.0: The HTTP one

Changed response type to HTTP.
Rearchitected for superior performance.

v1.1

wtfd 1.1 improves compatibility with Ubuntu 16.04 and reduces its network use.

• No longer sends a trailing NUL byte.
• systemd service file works with older versions of systemd, especially systemd 229 in Ubuntu 16.04.
• Disallowed system calls (via systemd policy) return EPERM rather than terminating the process.

v1.0

Initial Debian/Ubuntu packaged release with systemd service.