out: fix warning: ‘http_conn_close’ defined but not used

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
fix LD_LIBRARY_PATH order to include the build directories first

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
dvbtee: add basic usage help to command line application

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
dvbtee: add additional help & command-line examples

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>