Fix bug 43800. Make clearer relationship between APR and native in docs, error messages and the installer.
Fix bug 43800. Make clearer relationship between APR and native in docs, error messages and the installer.

git-svn-id: b819289d3a0e8888cd070d2ae628b7cf730b797f@607875 13f79535-47bb-0310-9956-ffa450edef68

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