Renaming evar_env/evar_unfiltered_env into evar_filtered_env/evar_env
for better uniformity of naming policy.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16172 85f007b7-540e-0410-9357-904b9bb8a0f7
Fixed synchronicity of filter with evar context in new_goal_with.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16173 85f007b7-540e-0410-9357-904b9bb8a0f7
Fixing bug #2969 (admit failing after Grab Existential Variables due
to inconsistency in using evar_hyps which is unfiltered and evar_env
which is filtered).

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16175 85f007b7-540e-0410-9357-904b9bb8a0f7
No reason a priori for using unfiltered env for printing
goal. Filtered env is intended to be type-safe.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16177 85f007b7-540e-0410-9357-904b9bb8a0f7