Copied 4.1.2 and 4.1.3 release notes from the 4.1.x branch
Copied 4.1.2 and 4.1.3 release notes from the 4.1.x branch

git-svn-id: 6006d5852951f43e4bf20b1aa071d815bf420463@1157112 13f79535-47bb-0310-9956-ffa450edef68

apache/httpcore,apache/httpcomponents-core,apache/httpcore,ok2c/httpcore