Prior to this commit, the isClientDisconnectedException() method in
DisconnectedClientHelper checked whether the message of the ultimate
exception in an exception chain contained one of the phrases "broken
pipe" or "connection reset by peer". However, that failed to match if
the exception message contained "Connection reset", which is the case
for the SocketException thrown by throwConnectionReset() in
sun.nio.ch.SocketChannelImpl.
This commit therefore replaces the "connection reset by peer" phrase
with "connection reset" in order to support all exception messages
containing "connection reset".
Closes gh-33064
203fa75196