[Python-Dev] Two new environment variables to debug Python 2.7

[Victor Stinner]

Hi,

FYI I just merged two pull requests into Python 2.7, each add a new
environment variable changing the behaviour in debug mode:

bpo-31733: don't dump "[xxx refs]" into stderr by default anymore
Set PYTHONSHOWREFCOUNT=1
commit 3c082a7fdb472f02bcac7a7f8fe1e3a34a11b70b

bpo-31692, bpo-19527: don't dump allocations counts by default anymore
Set PYTHONSHOWALLOCCOUNT=1
commit 7b4ba62e388474e811268322b47f80d464933541

I never ever used "[xxx refs]" to detect a reference leak. I only use
"./python -m test -R 3:3 test_xxx" to detect reference leaks. To be
honest, usually I only run such test explicitly when one of our
"Refleaks" buildbot starts to comlain :-)

Victor