Update gdp-create man page to match code.
Document gdp-create -w flag.
Rationalize lots of documentation. Fix inconsistencies in some
parameter names (e.g., swarm.gdp.gdp-create.server,
swarm.gdp.creation-service.name, and swarm.gdp.create.service). Some
minor code changes for consistency changes, but mostly docs.
Cleanup on human-oriented name handling during creation, including
documentation. Big changes: don't allow a "human name" that looks like
a base-64-encoded name; use GDP_NAME_ROOT when creating a new log using
gdp-create; treat a zero-length GDP_NAME_ROOT as though the variable...
Mega-change: new object creation API with updated metadata; internal
name is hash of metadata, not hash of human name; query and maintain
human-oriented name to GDPname directory (HONGD).
The grand renaming: GCL is (mostly) gone in favor of GOB and GIN.