This is tested on
  Solaris 2.5.2, 2.6, 7, 8/SPARC, HP-UX 10.20, 11.00,
  Tru64 UNIX 4.0D, 5.0A, IRIX 6.2, 6.5, AIX 4.3.2
and it works ok.

This patch *requires* autoconf 2.52.

Merge across rsync+ patch; add a little documentation to the manpage.  More documentation would be better.

The HP manual says this will work on old HP/UX versions; I'm not sure
about other systems.  Possibly it will break on old BSD-derived
systems with 32-bit int, 64-bit size_t and no socklen_t, if there are
any such.

find one that works.  This helps on platforms like HP/UX and UNICOS
where the argument to getsockopt is neither socklen_t nor int.

warnings on platforms (e.g. AIX) where this type is defined and not
int.

exit on a signal.)

get an error.

on 2.13.  See "info:(autoconf)New Macros".

message should explain that you probably need to be root.

(Why leave off the final S?  Kernighan must have been a *really* slow
typist.)

  The --cvs-exclude option is broken in the CVS version of rsync
  because of a cut-and-paste-induced bug in exclude.c:

  This bug could cause the sending rsync to crash when it dereferenced
  a NULL pointer.

the double-quotes to AC_DEFINE_UNQUOTED instead of having a separate step.

manually put the defines into acconfig.h.

"file(s)" in rsync.yo was being improperly translated by yodl2man so I
changed it to just "files".