Made sure that the variables ap_listenbacklog and ap_listeners are initialized

before they are used to avoid linker errors when using the NLMCONV utility
to build Apache for NetWare.  Patch submitted by Pavel Novy.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@90060 13f79535-47bb-0310-9956-ffa450edef68