command_list.txt

adding file to keep track of CLI parser syntax
adding "addr" variable to FERNGroup

FERNGroups need to know what address they serve on because diffrent
groups can/will advertise on different addresses. This is a setup for
NAT.
adding LOCALHOST record

the LOCALHOST record is a static one for use in the Service class.
Rather than set an address, it denotes that this host is advertising
this name. Similar to service-name field, this record is translated to
an actual address when we return Service + Group = FERNObject