Additional comments about resolveHosts attribute of AccessLogValve.

Additional comments about resolveHosts attribute of AccessLogValve.
- The resolveHosts attribute could be used to change the meaning of "common" and "combined" patterns (as it still does in JDBCAccessLogValve), so I mentioned in the docs what to do when that is what the admin wants.
- Align Javadoc with Configuration Reference.
- Mention the effect of enableLookups attribute of connector on ExtendedAccessLogValve.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1152716 13f79535-47bb-0310-9956-ffa450edef68