hghave: add "absimport" feature to check "absolute_import" in __future__
This patch adds "absimport" feature to check whether "absolute_import"
exists in __future__, which means supporting module loading by
absolute name.
This check is needed for portability of test code using
"absolute_import", because Python earlier than 2.5 doesn't support it.
[ original upstream message ]
syntax: glob
*.pyc
*.pyo
*~
*.swp
*.orig
*.rej
.DS_Store
build/*
MANIFEST