Projekt do ISA Jan Beran * Work with getopt: https://www.gnu.org/software/libc/manual/html_node/Getopt-Long-Option-Example.html?fbclid=IwAR1qEblS7WEVcPSl2tWu_ZHrYs1sQdmMeXyCYptwVqmF6QULYJrURPYZvE4 * DNS info: https://www2.cs.duke.edu/courses/fall16/compsci356/DNS/DNS-primer.pdf * DNS_resolver on github: https://gist.github.com/fffaraz/9d9170b57791c28ccda9255b48315168 * doc in tex https://cs.overleaf.com/project/5dac335056a0ef00012b80e4