middleware: use config consistently in https_fixup 070b8c39736f did for unknown reasons introduce a use of the global kallithea.CONFIG . Instead, consistently use the application config object that has been passed.

[tox]
minversion = 1.8
envlist = py27-pytest

[testenv]
setenv =
    PYTHONHASHSEED = 0
deps =
    -r{toxinidir}/dev_requirements.txt
    python-ldap
    python-pam
commands =
    pytest: py.test {posargs}