onWritePossible() is a server specific method

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1436824 13f79535-47bb-0310-9956-ffa450edef68
onWritePossible() is a server specific method

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1436826 13f79535-47bb-0310-9956-ffa450edef68