Switch the prefork MPM over to the new pollset interface.
* server/mpm/prefork/prefork.c:
(listensocks[]): removed. not required.
(child_main): stop using listensocks[] in favor of an apr_pollset_t. if
there is just one listener, then always refer to that listener's
listen_rec for further processing, otherwise poll and pick up the
listen_rec pointer from the polling structure's client_data. tweaked
the round-robin for the new pollset API (and documented).
cleaning: removed 'offset' which is obviated by the use of a pointer
to a listen_rec. tighten the block-scope of several variables.
switch to use a 'status' variable name rather than three separately
named variables. rename n->numdesc to be more obvious.
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@101799
13f79535-47bb-0310-9956-
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