+ The problem with this is that it is really hard to get right on
+ platforms that have a half-working implementation, so redefining
+ these functions clashes with system headers, and leaving them out
+ breaks. This affects at least OSF/1, RedHat 5, and Cobalt, which
+ are moderately improtant.
+
+ Perhaps the simplest solution would be to have two different files
+ implementing the same interface, and choose either the new or the
+ old API. This is probably necessary for systems that e.g. have
+ IPv6, but gethostbyaddr() can't handle it. The Linux manpage claims
+ this is currently the case.
+
+ In fact, our internal sockets interface (things like
+ open_socket_out(), etc) is much narrower than the getaddrinfo()
+ interface, and so probably simpler to get right. In addition, the
+ old code is known to work well on old machines.
+
+ We could drop the rather large lib/getaddrinfo files.
+
+
+Other IPv6 stuff:
+