move md5 to its own function

fix md5 openssl deprecation error. this should resolve #29

fix memory leak by closing pcap handle

log source and destination ports. this should help with #28

remove debugging printf

try to fix HASSH again

attempt to fix hassh

remove newline

fix typos

remove newline, use strerror

add note about macs

removed

add links to HASSH

added and removed some words. minor formatting changes.

update year