Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=51813
Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=51813

Add NULL-checking for s->net to avoid SIGSEGV in situations where it appears a socket has been recycled.


git-svn-id: 679f85b5bf57d2ff0a88d7b3afad16d7e2f73532@1518225 13f79535-47bb-0310-9956-ffa450edef68

rmaucher/tomcat-native-openssl,andreydomas/tomcat-native,rmaucher/tomcat-native-openssl,andreydomas/tomcat-native,andreydomas/tomcat-native,andreydomas/tomcat-native,andreydomas/tomcat-native,rmaucher/tomcat-native-openssl,rmaucher/tomcat-native-openssl,rmaucher/tomcat-native-openssl