Renames CTA_ArchiveFileID to sys.archive.file_id
Renames CTA_StorageClass to sys.archive.storage.class

The blob is a set of type/value pairs which can be serialised to a byte
array for storage in the DB.

The blob is a set of type/value pairs which can be serialised to a byte
array for storage in the DB.

For now: puts a message in the log, does nothing and returns success.

Json output is now available by setting the XRootD debug level appropriately

Integrates XRootD logging

Use in the EOS workflow/bash scripts is deprecated. However it's useful
to keep the script around for now to test the SSI workflows without needing
to invoke EOS.

As EOS is parsing stderr to get the archive ID

Previously took hostname and port as separate parameters, but they are
provided together in the config file so no point in separating them just
to recombine them.

This allows specifying different protocol buffers for EOS and CTA Admin
messages, both of which must be processed by the same XRootD plugin in
the CTA Frontend.

This is deprecated but is useful for testing: it allows eoscta_stub to
be dropped in in place of the "cta archive" command in the WFE in the
current test setup.