Merge remote-tracking branch 'kuba/auto-2.6-squeeze' into both

Combining the --debug gating changes with Kuba's 2.6 support

bootstrap/README

@@ -2,6 +2,6 @@ This directory contains scripts that install necessary OS-specific
 prerequisite dependencies (see docs/using.rst).
 
 General dependencies:
-- git-core: requirements.txt git+https://*
+- git-core: py26reqs.txt git+https://*
 - ca-certificates: communication with demo ACMO server at
-  https://www.letsencrypt-demo.org, requirements.txt git+https://*
+  https://www.letsencrypt-demo.org, py26reqs.txt git+https://*

bootstrap/dev/venv.sh

@@ -4,7 +4,7 @@
 export VENV_ARGS="--python python2"
 
 ./bootstrap/dev/_venv_common.sh \
-  -r requirements.txt \
+  -r py26reqs.txt \
   -e acme[testing] \
   -e .[dev,docs,testing] \
   -e letsencrypt-apache \

bootstrap/venv.sh

@@ -13,14 +13,14 @@ VENV_PATH=${VENV_PATH:-"$XDG_DATA_HOME/$VENV_NAME"}
 # later steps, causing "ImportError: cannot import name unpack_url"
 if [ ! -d $VENV_PATH ]
 then
-  virtualenv --no-site-packages --python python2 $VENV_PATH
+  virtualenv --no-site-packages --python ${LE_PYTHON:-python2} $VENV_PATH
 fi
 
 . $VENV_PATH/bin/activate
 pip install -U setuptools
 pip install -U pip
 
-pip install -U letsencrypt letsencrypt-apache # letsencrypt-nginx
+pip install -U -r py26reqs.txt letsencrypt letsencrypt-apache # letsencrypt-nginx
 
 echo
 echo "Congratulations, Let's Encrypt has been successfully installed/updated!"