Minor refactoring: move the creation of the pollset and associated

data structures outside of the listener thread function.  The point
of this is to facilitate future experiments with different concurrency
models like Leader/Followers as potential alternatives to the current
Reactor design.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@332879 13f79535-47bb-0310-9956-ffa450edef68