revlog: list older-but-still-around file in `files`
These older files will eventually be removed, but we have to take them in account until they are. So we update `files` to keep fncache happy.
Differential Revision: https://phab.mercurial-scm.org/D10868
Mercurial's documentation is kept in reStructuredText format, which is
a simple plain text format that's easy to read and edit:
http://docutils.sourceforge.net/rst.html
It's also convertible to a variety of other formats including standard
UNIX man page format and HTML. You'll need to install Docutils:
http://docutils.sourceforge.net/
Use the Makefile in this directory to generate the man and HTML pages.