Align the readMessage() signature in NIO with the BIO and APR.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1519091 13f79535-47bb-0310-9956-ffa450edef68
Pull up receive

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1519097 13f79535-47bb-0310-9956-ffa450edef68