Tag this channel as a client one (from a Socket point of view)
Please note that ISOChannel implementations may choose to
implement ClientChannel as well as ServerChannel, being a
client does not mean it can not be a server too.
DirPoll operates on a set of directories which defaults to
request
response
tmp
run
bad
archive
scanning for incoming requests (of varying priorities)
on the request directory and processing them by means of
DirPoll.Processor or DirPoll.FileProcessor