Bug#348336: improve section on shared config files

[Santiago Vila <sanvila@unex.es>]

+            Sometimes two or more packgages need to be able to modify the
+            same configuration file. One such case is were related packages
+            share a configuration file (e.g. bash and other bourn compatible
+            shells share /etc/profile).

You are implicitly saying that there are packages that "need" to modify
/etc/profile. The way I read policy 9.9, packages should not need
to modify /etc/profile to be useful.

Therefore I object to this proposal in its current form.