## Exercise 3

 1. Combine ‹gethostbyname› with the socket client code to fetch a
    document given on the command line.
 2. The host to contact is the first argument.
 3. The filename part of the URL to fetch is the second argument.
 4. Print the reply to ‹stdout›.
 5. E.g. ‹./a.out ix.io /1FWS› will send the following data:
    
         GET /1FWS HTTP/1.1\r\nHost: ix.io\r\n\r\n
             ^^^^^ the url           ^^^^^ hostname

The homework is, as usual, in ‹hw.txt›.
