Change JavaDoc so that sentences start with upper case letters

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/fileupload/trunk@1456911 13f79535-47bb-0310-9956-ffa450edef68
Fix typo in JavaDoc

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/fileupload/trunk@1456912 13f79535-47bb-0310-9956-ffa450edef68