DMC-1324: Enable XATTR operations in the HTTP plugin
This merge requests implements the following gfal top level functions in the http plugin:
-
getxattrG(..)
,listxattrG(..)
,listxattrG(..)
With this merge request the http
will support the user.status
attribute and a newly introduced attribute "taperestapi.version
", which tells the user the current version of the Tape REST API on the remote storage endpoint.