Fixes #4861: Fix link when using a different context path
Merge pull request #501 from fanf/arc_4478/impl_4781_remove_rudder_rule_variables

Arc 4478/impl 4781 remove rudder rule variables
Merge pull request #516 from VinceMacBuche/bug_4861/Add_prefix_utl

Fixes #4861: Fix link when using a different context path
Fixes #4771: Rule grid use now json as Data
Merge pull request #503 from VinceMacBuche/ust_4770/implem_4771/rule_optimization

Fixes #4771: Rule grid, now stored as Json
Fixes #4782: split parsing and binding of interpolated vars.

Massive speed gain (x10) and massive code simplification