PORT: AIX now uses USE_FCNTL_SERIALIZED_ACCEPT. PR#849

PORT: i386 AIX does not have memmove. PR#1267
PORT: HPUX now defaults to using Spencer regex.  PR#482, 1246
PORT: Some versions of netbsd don't automatically define
    __NetBSD__.  Workaround by defining NETBSD. PR#977
PORT: Unixware 2.x requires -lgen for syslog. PR#1249
PORT: Ultrix appears to not have syslog.
PORT: Basic Gemini port (treat it like unixware212).
PORT: All SVR4 systems now use NET_SIZE_T = size_t, and
    use HAVE_SHMGET.

Submitted by:	various
Reviewed by:	Dean Gaudet, Jim Jagielski, Martin Kraemer, Brian Behlendorf


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@79458 13f79535-47bb-0310-9956-ffa450edef68