Bug#88029: allow rules file to be non-makefile

["Sean 'Shaleh' Perry" <shaleh@valinux.com>]

> 
> I would like to propose that the debian/rules file is allowed to be
> non-makefile. Any kind of a program that can do the required stuff can be a
> debian/rules file. We shouldn't prohibit it when someone e.g. writes a short
> shell script or another interpreted script, as long as it works.
> 

I am against this.  Grab the shoop package for an example of what this will
lead to.

Debian developers should be able to read and if need be NMU another developers
package.  Allowing rules files to be arbitrary code makes this harder.