Correct memory leaks

[MikeEdgar]

Please consider this pull request to free memory currently left allocated. Memory leaks may occur over time in the do_accept and new_connection functions.

The scenario tested to produce the problem is using mmproxy in front of OpenSSH. Without the changes, this script loop will cause growing heap utilization due to the leak.

for i in {1..10000}; do 
  echo -en "PROXY TCP4 0.0.0.0 0.0.0.0 0 0\r\nSSH-2.0-" | nc -W1 localhost 2222 > /dev/null; 
done

[majek]

thanks