Add documentation for WEBrick's DigestAuth

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29224 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/webrick/config.rb

@@ -82,6 +82,27 @@ module WEBrick
       :AutoReloadUserDB     => true,
     }
 
+    ##
+    # Default configuration for WEBrick::HTTPAuth::DigestAuth.
+    #
+    # :Algorithm:: MD5, MD5-sess (default), SHA1, SHA1-sess
+    # :Domain:: An Array of URIs that define the protected space
+    # :Qop:: 'auth' for authentication, 'auth-int' for integrity protection or
+    #        both
+    # :UseOpaque:: Should the server send opaque values to the client?  This
+    #              helps prevent replay attacks.
+    # :CheckNc:: Should the server check the nonce count?  This helps the
+    #            server detect replay attacks.
+    # :UseAuthenticationInfoHeader:: Should the server send an
+    #                                AuthenticationInfo header?
+    # :AutoReloadUserDB:: Reload the user database provided by :UserDB
+    #                     automatically?
+    # :NonceExpirePeriod:: How long should we store used nonces?  Default is
+    #                      30 minutes.
+    # :NonceExpireDelta:: How long is a nonce valid?  Default is 1 minute
+    # :InternetExplorerHack:: Hack which allows Internet Explorer to work.
+    # :OperaHack:: Hack which allows Opera to work.
+
     DigestAuth = {
       :Algorithm            => 'MD5-sess', # or 'MD5'
       :Domain               => nil,        # an array includes domain names.