Correct a typo.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1545814 13f79535-47bb-0310-9956-ffa450edef68
Correct a typo in documentation: a network interface name is not a boolean option.
(Reviewing r1498342 )

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1545832 13f79535-47bb-0310-9956-ffa450edef68