For now the goal is to make testnode running, usage optimisation will be
applied later.

Use argparse and configparser in order to being able to pass parameters.

security question (default is ask).

From the "git-push-should-be-slower" department.

This way, it's possible to display nothing in a FormBox.
Useful only when formbox_target_id is computed.

not.

This will allows to use it for several different external method
calls

requesting a new account or resetting a password to respective
login_form.

- a list of repositories to synchronize can be provided
- the first repository is used for software
- transfer project revision with string like
  [repo x]=[commit count x]-[hash x],[repo y]=[commit count y][hash y]
- change related to new structure :
  recipe slapos.recipe.erp5testnode is inside slapos.cookbook egg
- allow authentification setting for several repositories
- drop support for svn

Mostly formatting changes and few obvious mistakes.

Same as 0526e075
but keeping erp5testnode because it will go back into this repository.

This reverts commit f0023bef.

Luke went to overcomplex idea to solve simple problems. In order to avoid
exposing bad ideas, commit gets reverted.

Make sure no more than set in preferences authentication failures are
saved.
Redirect to 'Update Credentials' form if after successful login password
is to expire soon.