I agree with the Exim community that the exim-4.xx has reached production
Move exim to exim-old for folks who need exim-3.xx, because the
configuration file for exim-4.xx is not backward compatible. Move
exim-devel to exim, removing NO_LATEST_LINK:
repo-copy exim -> exim-old
copy over exim-devel -> exim
Slave ports are intended for use with the exim port, as before, so they
now build and install for exim-4.xx.