GitLab

While the new APIs allow applications to send/receive raw payloads
of a specified content type from/to Servers/Clients, the stack is
currently lacking the following functionalities:

-Ability to transport raw payloads of a large size in a block-wise transfer.
-Ability to send raw payloads in asynchronous notifications.
-Ability to send raw payloads in separate responses.
-Ability to issue requests eliciting responses of a specific content type
(i.e. besides the default, CBOR).
Signed-off-by: Kishen Maloor <kishen.maloor@intel.com>