[CSS21] Reverted some changes to remain exactly equal to the REC, typos included, apart from the red warning boxes.

Author: bert-github

css21/Project.cfg

@@ -15,7 +15,7 @@
 @source-extension .src
 
 @stylesheet style/default.css text/css
-@stylesheet http://www.w3.org/StyleSheets/TR/W3C-_THE_STYLE_.css text/css
+@stylesheet https://www.w3.org/StyleSheets/TR/W3C-_THE_STYLE_.css text/css
 @contents "cover.html#minitoc"
 
 # Additional links. If for navbar, then add a 3rd column