For your homework, you will continue working with shared libraries and call
overrides. In particular, you should look at overriding hostname resolution
that is available in the system `libc`.

Override these two functions:

  * `gethostbyname` [1pt]
  * `getaddrinfo`   [2pt]

in such a manner than both return the address `127.0.0.1` when the program
tries to resolve `example.com`. You should hand in your modified `preload.c`
as the solution. In addition to explaining what you did in the code, the
report should have two additional items:

 * explain the consequences of your hooks [1pt]

In particular, focus on how dangerous this is and whether SSL or some other
common security measure would thwart the attack.

 * try your preloaded library with a few programs [1pt]

You should at least check `telnet`, but include at least one other program,
preferably two, and explain your observations. Besides telnet, you can try
with `ssh` or a browser -- in the latter case, you need to do your work on a
desktop computer. If you are working on `aisa` exclusively, you can try with
the command `links` -- however, do bear in mind that this is a very simple
program and its behaviour is not representative of modern browsers!