Added more comments about POLLHUP.

Rev: doc/TODO:1.47

doc/TODO

@@ -243,7 +243,10 @@ Find out why opening /dev/ptmx failes occasionally (errno = 19, no
 such device).
 
 Add some workaround for the poll()-bug in linux/glibc-2.07 reported by
-Bazsi.
+Bazsi. Hmm, this is probably not a bug. I have to find out what the
+right way is to handle the poll conditions POLLERR, POLLHUP and
+POLLERR.
+
 
 Implement some limit on the amount of data that may be buffered for
 write on a connection. When the limit is exceeded, the connection