Fixed compile error: ServerSocket does not implement Closeable until Java 7

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1597251 13f79535-47bb-0310-9956-ffa450edef68
fixed compile error: DatagramSocket does not implement Closeable until Java 7

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1597254 13f79535-47bb-0310-9956-ffa450edef68
FIx generics warnings.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1597257 13f79535-47bb-0310-9956-ffa450edef68
Better ivar name.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1597258 13f79535-47bb-0310-9956-ffa450edef68
camelCase methods.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1597259 13f79535-47bb-0310-9956-ffa450edef68