test with and without FEC

src/sender_utils.c

src/sender_utils.h

tests/advanced_test.sh

tests_logs/advanced_tests/greeting/adv_greeting_link.log

...gs/advanced_tests/greeting/adv_greeting_received_file.txt

tests_logs/advanced_tests/greeting/adv_greeting_receiver.log

tests_logs/advanced_tests/greeting/adv_greeting_sender.log

...dvanced_tests/greeting/adv_valgrind_greeting_receiver.log

.../advanced_tests/greeting/adv_valgrind_greeting_sender.log

..._logs/advanced_tests/greeting/greeting_receiver_stats.csv

tests_logs/advanced_tests/greeting/greeting_sender_stats.csv

...ogs/advanced_tests/long_message/adv_long_message_link.log

...ced_tests/long_message/adv_long_message_received_file.txt

...advanced_tests/long_message/adv_long_message_receiver.log

...s/advanced_tests/long_message/adv_long_message_sender.log

...tests/long_message/adv_valgrind_long_message_receiver.log

...d_tests/long_message/adv_valgrind_long_message_sender.log

...vanced_tests/long_message/long_message_receiver_stats.csv

...advanced_tests/long_message/long_message_sender_stats.csv

tests_logs/advanced_tests/smile/adv_smile_link.log