<http://www.ipv6.org/impl/mac.html> says that Apple do not support
IPv6 yet. If your build fails, try again with --disable-ipv6.
-There is an unresolved problem with the OSX implimentation
-of setgroups causing rsyncd to fail. The workaround is to
-#undef HAVE_SETGROUPS in config.h
-
IBM AIX NOTES
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