DMC-1329: Create taperestapi.uri extended attribute in Gfal2 HTTP plugin
The taperestapi.uri
attribute is introduced only for http protocol and will tell the user the uri of the Tape REST API:
- The
gfal_http_get_tape_api_version(..)
becomesgfal_http_getxattr_internal(..)
and is now a general function to internally query http xattrs based on a key given by the user of the function.