Ensure that connectionCount remains thread-safe

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1528174 13f79535-47bb-0310-9956-ffa450edef68
If there are sockets to close, close them rather than waiting for the next Poller run.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1528175 13f79535-47bb-0310-9956-ffa450edef68
Address issue reported with high CPU usage under low load load.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1528176 13f79535-47bb-0310-9956-ffa450edef68
More debug logging for the APR/native connector.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1528177 13f79535-47bb-0310-9956-ffa450edef68