[server] Make connection pooler configurable and set better default values Drop the configuration connections-pool-size and add new configurations options: * connections-pool-min-size. Set to 0 by default so we open connections only when needed. This avoid opening min-size*processes connections at startup, which is, it think, a good default. * connections-pool-max-size. Set to 0 (unlimited) by default, so we move the bottleneck to postgresql. * connections-idle-timeout. Set to 10 minutes. I don't have arguments about this except that this is the default in pgbouncer.

[tox]
envlist = py3,flake8,check-manifest

[testenv]
deps =
  pytest
commands =
  {envpython} -m pytest {posargs:test}

[testenv:flake8]
basepython = python3
skip_install = true
deps =
  flake8
commands = flake8

[testenv:check-manifest]
skip_install = true
deps =
  check-manifest
commands =
  {envpython} -m check_manifest {toxinidir}

[flake8]
exclude = cubicweb_%(cubename)s/migration/*,test/data/*,.tox/*