A continuum in the history for this file isn't necessary. What _is_
important is the purpose of the patch today:
*) Changes the test used to determine whether a file should be installed
to cope with files which we "touch" to zero bytes for packaging
purposes.
*) Causes the configure file to be installed as a sample only. The
administrator needs to rename this file to "activate" exim.
*) Changes the invocation of make-info to be less prone to fail on
silly errors and fixes the info(1) titles so that, for example
``info exim'' actually enters the exim.info file.
