[css2] Corrected definition of border-color's computed value.

--HG--
extra : convert_revision : svn%3A73dc7c4b-06e6-40f3-b4f7-9ed1dbc14bfc/trunk%402060

Author: bert-github

css2/properties/properties.db

@@ -96,7 +96,8 @@
   no;;
   N/A;;
   visual;;
-  as specified
+  when taken from the 'color' property, the computed value of 'color';
+   otherwise, as specified
 */
 /* border-color;;
   [ <color> | transparent ]{1,4} | inherit;;