Reorder and correct creation and merge of server records, optimizing
significantly for all of our null / 0 value defaults (we had always
palloc'ed, so this was very wasteful).

Corrects a segfault in 2.3.1-alpha candidate, which evaluated the
accf_map.  Due to the backwards construction of the merge (patched)
this was never initialized in virtual servers.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@731067 13f79535-47bb-0310-9956-ffa450edef68