All current socket samples as one of the points show portability to
POSIX platforms, and provide POSIX makefiles to let user build such
a version of application easily. These Makefiles were lost during
CMake conversion.
Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Implements asynchronous TCP echo server using non-blocking sockets
and poll, with concurrent connections support.
Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>