Note that using the old sockets API probably will not work

sufficiently on some ipv6 systems.

TODO

@@ -313,14 +313,21 @@ Hard-link handling
 
 IPv6
 
-  Put back the old socket code; if on a machine that does not properly
-  support the getaddrinfo API, then use it.  This is probably much
-  simpler than reimplementing it.  This might get us working again on
-  RedHat 5 and similar systems.  Although the Kame patch seems like a
-  good idea, in fact it is a much broader interface than the
-  relatively narrow "open by name", "accept and log" interface that
-  rsync uses internally, and it has the disadvantage of clashing with
-  half-arsed implementations of the API.
+  Perhaps put back the old socket code; if on a machine that does not
+  properly support the getaddrinfo API, then use it.  This is probably
+  much simpler than reimplementing it.
+
+  Alternatively, 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.
+
+  This might get us working again on RedHat 5 and similar systems.
+  Although the Kame patch seems like a good idea, in fact it is a much
+  broader interface than the relatively narrow "open by name", "accept
+  and log" interface that rsync uses internally, and it has the
+  disadvantage of clashing with half-arsed implementations of the API.
 
   Implement suggestions from http://www.kame.net/newsletter/19980604/
   and ftp://ftp.iij.ad.jp/pub/RFC/rfc2553.txt