[CTX] [ALL]
ICP parameter*      ==  ICP=icpServerList[:icpServerSpec[:connMap]]
     icpServerList  ==  icpServer[,icpServer]*
         icpServer  ==  icpHost[/icpType/proxyPort/icpPort]
     icpServerSpec  ==  icpOptions:proxyPort:icpPort
           connMap  ==  ProtoList:dstHostList:srcHostList
                    --  default: none
                    --  restriction: applicable to {HTTP,FTP}-DeleGate