mpatch: add setup_mpatch_cffi.py This file got dropped when the corresponding setup.py changes were made.

journal: rename on disk files to 'namejournal' The 'journal' naming is already used by the transaction journal. Having an unrelated group of file with such a close naming is confusing and error prone. We rename the file used by the 'journal' extension to use 'namejournal' as the extension track the location of various 'names'.