Archived PR

• 1789 https://github.com/ggouaillardet/ompi/tree/poc/convertor_sendrecv
• 1860 https://github.com/ggouaillardet/ompi/tree/topic/configury_no_cxx
• 2070 https://github.com/ggouaillardet/ompi/tree/poc/fdir
• 2088 https://github.com/ggouaillardet/ompi/tree/poc/unique_top_session_dir