Merge pull request #500 from fanf/arc_4478/impl_4779_remove_CLIENTSLIST

Fixes #4779: remove CLIENTSLIST system variable specific code
Fixes #4787: Correct the is of tooltip for n/a rules
Merge pull request #502 from fanf/bug_4787/Bad_tooltip_for_na_rules

Fixes #4787: Correct the is of tooltip for n/a rules
Merge branch 'branches/rudder/2.9' into branches/rudder/2.10
Merge branch 'branches/rudder/2.10'
Fixes #4800: Typo in latest API URL
Merge pull request #505 from VinceMacBuche/bug_4800/typo_in_api_latest_url

Fixes #4800: Typo in latest API URL
Fixes #4803: Remove dead code in Node API 4
Merge pull request #506 from VinceMacBuche/arch_4802/4803/dead_code

Fixes #4803: Remove dead code in Node API 4
Merge branch 'branches/rudder/2.9' into branches/rudder/2.10
Merge branch 'branches/rudder/2.10'
Fixes #4856: update Rudder for last specs2 version
Fixes #4781: Remove rule variable kind
Issue #4782: split parsing and binding of interpolated vars.

Massive speed gain. For now, interpolation in parameters is not working.
Add interpolation variable in parameters
Try to make tests pass
Make tests pass, at last
Correct typo