Issue #2290435 by PQ: Fix broken link in robots.txt file

robots.txt

@@ -11,7 +11,7 @@
 # Ignored: http://example.com/site/robots.txt
 #
 # For more information about the robots.txt standard, see:
-# http://www.robotstxt.org/wc/robots.html
+# http://www.robotstxt.org/robotstxt.html
 #
 # For syntax checking, see:
 # http://www.frobee.com/robots-txt-check