documentation for "join" limitation on Solaris 8

[Paul Eggert]

I installed this:

2005-01-13  Paul Eggert  <address@hidden>

        * doc/autoconf.texi (Limitations of Usual Tools): Document bug
        in Solaris 8 join.  Problem reported by Tomohiro Suzuki on
        bug-tar mailing list.

--- autoconf.texi       5 Jan 2005 07:53:52 -0000       1.862
+++ autoconf.texi       13 Jan 2005 21:03:11 -0000      1.863
@@ -11675,6 +11675,24 @@ Don't rely on @option{-w}, as Irix 6.5.1
 support it.
 
 
address@hidden @command{join}
address@hidden -----------------
address@hidden @command{join}
+Solaris 8 @command{join} has bugs when the second operand is standard
+input, and when standard input is a pipe.  For example, the following
+shell script causes Solaris 8 @command{join} to loop forever:
+
address@hidden
+cat >file <<'EOF'
+1 x
+2 y
+EOF
+cat file | join file -
address@hidden example
+
+Use @samp{join - file} instead.
+
+
 @item @command{ln}
 @c ---------------
 @prindex @command{ln}