Implemented Document.contentType

LayoutTests/http/conf/lighttpd.conf

 server.tag                  = "LightTPD/1.4.19 (Win32)"
 server.modules              = ( "mod_accesslog",
                                 "mod_alias",
                                 "mod_cgi",
                                 "mod_rewrite" )
 
 # default document root required
 server.document-root = "."
 
 # files to check for if .../ is requested
 index-file.names            = ( "index.php", "index.pl", "index.cgi",
                                 "index.html", "index.htm", "default.htm" )
 # mimetype mapping
 mimetype.assign             = (
+  ".bmp"          =>      "image/bmp",
   ".gif"          =>      "image/gif",
   ".jpg"          =>      "image/jpeg",
   ".jpeg"         =>      "image/jpeg",
   ".png"          =>      "image/png",
   ".svg"          =>      "image/svg+xml",
   ".css"          =>      "text/css",
   ".html"         =>      "text/html",
   ".htm"          =>      "text/html",
   ".xhtml"        =>      "application/xhtml+xml",
   ".js"           =>      "application/x-javascript",
   ".log"          =>      "text/plain",
   ".conf"         =>      "text/plain",
   ".text"         =>      "text/plain",
   ".txt"          =>      "text/plain",
-  ".dtd"          =>      "text/xml",
-  ".xml"          =>      "text/xml",
+  ".dtd"          =>      "application/xml-dtd",
+  ".xml"          =>      "application/xml",
   ".manifest"     =>      "text/cache-manifest",
  )
 
 # Use the "Content-Type" extended attribute to obtain mime type if possible
 mimetype.use-xattr          = "enable"
 
 ##
 # which extensions should not be handle via static-file transfer
 #
 # .php, .pl, .fcgi are most often handled by mod_fastcgi or mod_cgi
@@ skipping 40 matching lines @@
   mimetype.assign = ( ".txt" => "text/plain; charset=koi8-r" )
 }
 
 # LayoutTests/http/tests/appcache/wrong-content-type.html uses an htaccess
 # to override mime type for wrong-content-type.manifest.
 $HTTP["url"] =~ "^/appcache/resources/wrong-content-type.manifest" {
   mimetype.assign = ( ".manifest" => "text/plain" )
 }
 
 # Autogenerated test-specific config follows.