typo in comments

git-svn-id: http://svn.apache.org/repos/asf/httpd/httpd/trunk@1566428 13f79535-47bb-0310-9956-ffa450edef68
Quick spelling fix

git-svn-id: http://svn.apache.org/repos/asf/httpd/httpd/trunk@1566449 13f79535-47bb-0310-9956-ffa450edef68