Log Message:
Update to 2.13, maintained by ttn at glug.org.  This is fairly clearly
the logical continuation of the code on the FSF site, which has not
been changed since April 2002.

Many changes since last FSF version:

- 2.13 | 2005-08-17
  - for speed, use `read-string!/partial' in (www cgi) and (www http)

- 2.12 | 2005-06-09
  - new proc in (www cgi): cgi:nv-pairs
  - contrib/*-check files mentioned in ChangeLog

- 2.11 | 2005-05-09
  - big-dishing-loop macros moved to (module) top-level
  - FSF street address updated in copyright notices

- 2.10 | 2005-04-17
  - changes to (www cgi)
    - cgi:values now maintains same order as in submitted form
    - cgi:init now resets all internal state (suitable for fastcgi)
  - new configure option: --disable-shsub
  - new module: (www server-utils cgi-prep)

- 2.9 | 2005-01-25
  - www:http-head-get can discard all but the alist portion of the msg obj

- 2.8 | 2004-11-20
  - new proc in (www main): www:http-head-get

- 2.7 | 2004-10-21
  - new proc in (www http): http:head

- 2.6 | 2004-07-15
  - cgi:make-cookie now accepts keywords for `name' and `value' args
  - bugfix: http:request handles missing response status-line TEXT as ""

- 2.5 | 2004-03-11
  - new proc in (www server-utils parse-request): skip-headers
  - new `(www server-utils answer) mouthpiece' command: #:add-formatted
  - new module: (www server-utils big-dishing-loop)

- 2.4 | 2004-03-01
  - changes to (www server-utils answer) proc `mouthpiece'
    - bugfix in #:rechunk-content (fencepost error)
    - #:send-reply sets 2nd position in status-box to content-length
  - new module: (www server-utils log)

- 2.3 | 2004-02-29
  - new module: (www server-utils parse-request)
  - new module: (www server-utils filesystem)
  - new module: (www server-utils answer)
  - new module: (www data http-status)
  - new module: (www data content-type)

- 2.2 | 2004-01-24
  - bug fix: `cgi:uploads' now handles "multipart/mixed" content properly
  - bug fix: `cgi:uploads' now deletes cell as documented
  - doc fix: `cgi:getenv' w/ key `http-accept-types' => list of strings
  - new feature: proc `http:post-form' now also handles "file uploads"
  - installation change: .scm files are punified (whitespace/comments removed)

- 2.1 | 2004-01-15
  - doc fix: `cgi:getenv' doc was missing
  - new module: (www url-coding)
  - proc `cgi:init' performance improvement (env var lazy init)

- 2.0 | 2004-01-13
  - incompatible API changes
    - cgi:make-cookie no longer accepts #&-style keywords (#:-style ok)
    - non-procedures no longer exported
      - for cgi-FOO (22 vars), read access now through proc `cgi:getenv'
      - no longer provided: http:version, http:user-agent
  - installation dir change
    - configure script determines $(GUILE_SITE)
    - modules installed as $(GUILE_SITE)/www/*.scm
  - module catalog updated on "make install" (if supported by system)
  - doc methodology/content improvements

- 1.1.1ttn5 | 2003-02-15
  - bug fix: http:request now extracts content-length info properly

- 1.1.1ttn4 | 2003-02-12
  - bug fix: http:get now uses `Host' header in the http request
  - bug fix: examples/wwwcat handles non-#f `program-arguments' values

- 1.1.1ttn3 | 2002-12-03
  - new proc in (www http): http:post-form

- 1.1.1ttn2 | 2002-10-20
  - for CGI scripts, handle SERVER_SOFTWARE that omits "/version" info

- 1.1.1ttn1 | 2002-10-05
  - for CGI scripts, HTTP_ACCEPT parsing now also handles ", "