說明:
	slrn分成group window和article window, 
	顧名思義, group window是選group的window, 
	article window是進入group後選article的window

======================  常用的鍵:  =========================== 
key for group window:
  
  s                  Subscribe to the current newsgroup.
  u                  Unsubscribe from the current newsgroup.
  L                  Toggle listing of unsubscribed groups.
  ( 含 search pattern, 要看全部group, 打 * 即可 )

  <ENTER>            進入group, 並詢問要讀幾篇文章
  <SPACE>            進入group, 不詢問, 只讀50篇文章 (看slrnrc的註解)
                                                                                
======================  常用的鍵:  =========================== 
key for article window:

  P                  Post a new article (no followup).
  f                  Post a followup to the current article.

  h                  Hide / Show the article window.
                                                                                
  a                  Author search forward.
  A                  Author search backward.
  s                  Subject search forward.
  S                  Subject search backward.
                                                                                
  ^                  enlarge_article_window
  Ctrl+^             shrink_article_window

  ESC p              read previous article in the same thread

  ESC Ctrl-C         Cancel article (you have to be the author).