[trac366] README tweaks

src/bin/sockcreator/README

@@ -32,11 +32,11 @@ must be a socket, not pipe.
   they would be passed to bind (note that both parameters are already prepared,
   like hton called on them).
 
-  The answer to this is either 'S' and then the socket is passed using sendmsg
+  The answer to this is either 'S' directly followed by the socket (using
-  if it is successful (it uses our send_fd, you can use recv_fd to read it).
+  sendmsg) if it is successful. If it fails, 'E' is returned instead, followed
-  If it fails, 'E' is returned, followed by either 'S' or 'B' (either socket()
+  by either 'S' or 'B' (either socket() or bind() call failed). Then there is
-  or bind() call failed). Then there is one int (architecture-dependent length
+  one int (architecture-dependent length and endianess), which is the errno
-  and endianess), which is the errno value after the failure.
+  value after the failure.
 
 The creator may also send these messages at any time (but not in the middle
 of another message):