Followup to r1553833:
A few more trace[d] -> track[ed] renaming.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1553906 13f79535-47bb-0310-9956-ffa450edef68
Followup to r1553838
Fix a missing bracket in documentation

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1553909 13f79535-47bb-0310-9956-ffa450edef68