* fixed the bug for pypy-5.8.0

* update changelog
Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* blacklist for old apps
Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* only blacklist pythonhome/path
Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* updated changelog
Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* be more agressive with blacklisting
Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* sub_env was a terrible idea
Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* changelog update
Signed-off-by: Kenneth Reitz <me@kennethreitz.org>