Do not skip records with nonblocking connections

Do not skip records with nonblocking connections

With non-blocking connections, do not skip records when receiving
the streams since entire value messages can be ignored which
in cause the entire stream to become out of sync.

For example, two mounts simultaneously send two unmaps
commands. The first one is read, then the second thrown
away due to skipping the record. Skipping this record
will cause XDR error later in processing of the stream.

Signed-off-by: Steve Dickson <steved@redhat.com>