that we have one function less.
  * Fixed coding style.
  * Removed FUCKING TABS.               ____.------.___
                           _______.----'`` ``` `` ``` ``-.
                      _.--' ` ```` ` `  ` ```  ``    ``  ``.
                  _.-'    ' ` `` ```      `` ` `'           `.  _
               .-''      ` H A H A H A `'  M A I S            \/.)
     .    . .-' /       `         `                  `      `` ||
     |`-.(``-.          `      `       `        ' `  `    ```  |\
     `.  '\```\        ``   `     V I E U X   ' ' ``  `-``    -|\\
       `/''````)       `` `          -        -   `````  ' '.' |\_)
        |`'_._`       ```      ''`  P O R C .   . ````        /
        // @) \    `   ``       ''' .              ```      '/
       /''''' |     ` \).`.'-.  ''' _    _         .`` `   '/
     .''''- `-'`.   . //   )--   '/,,',,' ,,,,''__,._`' '  /
   .'    ` `-  `   ' .'   /   ' /,;;;, ,___.---'     \ '' / \
   (`.  .'` __',`''''.--'/   ' /'-----'              | ' /  ))
    `'-'/  `'''_.---' \;;|-  '/            ,,,       | ''|`- |
      `'--'---'        |;|   /   ,,,,;;;;;;;;;;,,,,, |-' /`  |
                       |;|-'|   ,;;;;;;;;;;;;;;;; ;;;/  /|`'''
                       ''',,,''',,,,,,,,,,,,,,,'    /,,'''
                                   ''''

* Use RETSIGTYPE for signal handler return values.

* Got rid of static buffers; we now use cucul_free() to free exported
    buffers.
  * Fixed light background in the ANSI exporter by adding escape sequences for
    most terminal emulators.

are unable to cleanly restore the state.

a network port, we could have guessed.

+ Changed port to 51914 (rationale: it's 0xCACA; so okay, it's outside
      the registered ports area, but we'd never be accepted anyway).
    + Retry network sends in caca_get_event(), too.
    + Have a per-client buffer in case of network congestion. If that buffer
      gets full, just drop it and start again at the next frame.
    + Set the window title to "caca for the network".
    + Do not send the ANSI buffer's terminating \0.
    + Restore the SIGPIPE handler on close.
    + Set window size to 80x24 instead of 80x25.

writes. Currently works very badly with more than one client.

network_display() so that new clients immediately get the contents
    of the canvas and do not need to wait for a caca_display() call.

they can force a resize. We need to find a way to make those specific
    cucul - caca interactions unavailable to the clueless user.