Common Lisp NNTP client library
 ===============================
 

 This code was originally authored by Dimitre Liotev <dl@liotev.com> and released 

 under the terms of the General Public License. I acquired it by downloading the 

 tarball to be found here: http://znain.net/cl-nntp/ .. I've placed it on github
 with an eye to extension, but also for greater convenience.
 
 -- Brian O'Reilly, January 25, 2013.
 

 ## Description
 
 This is a NNTP client library. The current implementation is not
 complete, posting is not implemented yet.
 
 To load the system:
 
     (asdf:load-system "cl-nntp")
 
 Note that the name of the ASDF system is *``cl-nttp``*, but the lisp
 package is *``com.liotev.nntp``*, with *``cl-nntp``* and *``nntp``* specified
 as its nicknames.
 
 Here is an example of using some of the functions:
 
     ;; Connect to an nntp server
     (cl-nntp:connect "nntp.aioe.org" 119)
 
     ;; Select a group
     cl-nntp:group "comp.lang.lisp")
 
     ;; Fetch the current article
     (cl-nntp:article)
 
 The last server you connect to is the default server. If you connect to
 port 563 or 443, a TLS(SSL) connection will be used. If you want to use
 TLS with other ports you have to send the key parameter :use-tls to the
 cl-nntp:connect function. (Note that STARTTLS is not implemented yet but
 will be in the near future.)
 
 If the server requires authorization the use name and password will be
 searched in the user's .authinfo file, whose location you can specify by
 setting variable *authinfo-file-name*. There user name and password for
 the nntp server should be specified in the .authinfo file like this:
 
     machine server-name login user-name password pass-word
 
 For example if the server name is nntp.giganews.com, the use name is
 xxxer and the password is zzz555 the line would look like this:
 
     machine nntp.giganews.com login xxxer password zzz555
 
 If a authentication through the authinfo file does not succeed, the user
 will be asked to supply user name and password.
 
 
 ## The Network News Transfer Protocol (NNTP)
 
 NNTP is a protocol for reading and posting Usenet articles [\[1\]](#links).
 It is described in several RFC's:
 
  * [RFC 6048](http://www.rfc-editor.org/rfc/rfc6048.txt) - Network News
    Transfer Protocol (NNTP) Additions to LIST Command
 
  * [RFC 4643](http://www.rfc-editor.org/rfc/rfc4643.txt) - Network News
    Transfer Protocol (NNTP) - Extension for Authentication
 
  * [RFC 4642](http://www.rfc-editor.org/rfc/rfc4642.txt) - Using
    Transport Layer Security (TLS) with Network News Transfer Protocol
    (NNTP)
 
  * [RFC 3977](http://www.rfc-editor.org/rfc/rfc3977.txt) - Network News
    Transfer Protocol (NNTP)
 
  * [RFC 2980](http://www.rfc-editor.org/rfc/rfc2980.txt) - Common NNTP
    Extensions
 
 ## Links
 <a name="links"/>
 1. [The NNTP protocol](http://en.wikipedia.org/wiki/Network_News_Transfer_Protocol)