Merge PR #61877 into main

* refs/pull/61877/head:
	libcephfs_proxy: implement client side async rw operation
	libcephfs_proxy: implement server side async rw operation
	libcephfs_proxy: implement the async rw callback
	libcephfs_proxy: define async rw opcode and structures
	libcephfs_proxy: define some helper macros for callbacks
	libcephfs_proxy: move pointer obfuscation functions to proxy_helpers.h
	libcephfs_proxy: negotiate and use the async cbk feature
	libcephfs_proxy: implement asynchronous callbacks
	libcephfs_proxy: gracefully handle connection close
	libcephfs_proxy: add negotiation documentation
	libcephfs_proxy: replace legacy handshake by negotation in server side
	libcephfs_proxy: replace legacy handshake by negotation in client side
	libcephfs_proxy: implement server side negotiation
	libcephfs_proxy: implement client side negotiation
	libcephfs_proxy: implement receiving of negotiate structure
	libcephfs_proxy: add negotiation structures
	libcephfs_proxy: add support for control messages
	libcephfs_proxy: reuse proxy_link_{read|write}

Reviewed-by: Sachin Prabhu <sp@spui.uk>
Reviewed-by: Venky Shankar <vshankar@redhat.com>

diff --cc src/libcephfs_proxy/CMakeLists.txt
Simple merge