Dynamic name-tags

The only form of name-tags actually implemented were dynamic-name-tags. (The desired effects of static name-tags were obtained through the use of dynamic name-tags.) A dynamic name-tag was represented by a unique name, carried in the data part of a capability. A hash table, maintained in an ECS file by the directory system, provided an index into a C-list, private to the directory system. This C-list contained the capabilities, if any, currently associated with each dynamic name-tag.