ylwrap-refactor-abandoned-branch

Tag for the abandoned branch 'ylwrap-refactor'.

That branch has been too long inactive, failed out-of-sync with the
active Automake branches (maint and master), and the changes in it
have been superseded by the simpler and more useful ones recently
made by Akim Demaille (and merged back into 'maint' with commit
v1.12.2-27-gec5cb49).