New file for defining the End Of Connection (EOC) bucket type.

The new bucket type was introduced for connection level filters (Ex. SSL)
that need to send special data to the peer just before the socket is closed.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@102792 13f79535-47bb-0310-9956-ffa450edef68