Document the command line options

README

@@ -106,3 +106,69 @@ communicate with each other and a web server so these will not be documented.
 
 ---
 RUNNING:
+
+ckpool supports the following options:
+
+-A | --standalone
+-c CONFIG | --config CONFIG
+-d CKDB-NAME | --ckdb-name CKDB-NAME
+-g GROUP | --group GROUP
+-H | --handover
+-h | --help
+-k | --killold
+-L | --log-shares
+-l LOGLEVEL | --loglevel LOGLEVEL
+-n NAME | --name NAME
+-P | --passthrough
+-p | --proxy
+-S CKDB-SOCKDIR | --ckdb-sockdir CKDB-SOCKDIR
+-s SOCKDIR | --sockdir SOCKDIR
+
+
+-A Standalone mode tells ckpool not to try to communicate with ckdb or log any
+ckdb requests in the rotating ckdb logs it would otherwise store. All users
+are automatically accepted without any attempt to authorise users in any way.
+
+-c <CONFIG> tells ckpool to override its default configuration filename and
+load the specified one. If -c is not specified, ckpool looks for ckpool.conf
+whereas in proxy or passthrough modes it will look for ckproxy.conf
+
+-d <CKDB-NAME> tells ckpool what the name of the ckdb process is that it should
+speak to, otherwise it will look for ckdb.
+
+-g <GROUP> will start ckpool as the group ID specified.
+
+-H will make ckpool attempt to receive a handover from a running incidence of
+ckpool with the same name, taking its client listening socket and shutting it
+down.
+
+-h displays the above help
+
+-k will make ckpool shut down an existing instance of ckpool with the same name,
+killing it if need be. Otherwise ckpool will refuse to start if an instance of
+the same name is already running.
+
+-L will log per share information in the logs directory divided by block height
+and then workbase.
+
+-l <LOGLEVEL will change the log level to that specified. Default is 5 and
+maximum debug is level 7.
+
+-n <NAME> will change the ckpool process name to that specified, allowing
+multiple different named instances to be running.
+
+-P will start ckpool in passthrough proxy mode where it collates all incoming
+connections and streams all information on a single connection to an upstream
+pool specified in ckproxy.conf . Downstream users all retain their individual
+presence on the master pool. Standalone mode is implied.
+
+-p will start ckpool in proxy mode where it appears to be a local pool handling
+clients as separate entities while presenting shares as a single user to the
+upstream pool specified. Note that the upstream pool needs to be a ckpool for
+it to scale to large hashrates. Standalone mode is Optional.
+
+-S <CKDB-SOCKDIR> tells ckpool which directory to look for the ckdb socket to
+talk to.
+
+-s <SOCKDIR> tells ckpool which directory to place its own communication
+sockets (/tmp by default)