HTTPCORE-364: IOSessionImpl.getLocalAddress() creates unnecessary copy of channel

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk@1545087 13f79535-47bb-0310-9956-ffa450edef68
Rename local variable to avoid clash with field

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk@1545088 13f79535-47bb-0310-9956-ffa450edef68
Rename local variable to avoid clash with field

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk@1545090 13f79535-47bb-0310-9956-ffa450edef68
Inline variable and avoid hiding field of same name

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk@1545093 13f79535-47bb-0310-9956-ffa450edef68