New variables

| Variable | Description | |---------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------| | **rougail.general.varname**
[`string`](https://rougail.readthedocs.io/en/latest/variable.html#variables-types) `standard` `mandatory` `unique` `multiple` | No change.
**Default**:
- a | | **extra.var**
[`string`](https://rougail.readthedocs.io/en/latest/variable.html#variables-types) `standard` `mandatory` `unique` `multiple` | A variable.
**Default**:
- a | | **extra.dyn_*a*.var**
[`string`](https://rougail.readthedocs.io/en/latest/variable.html#variables-types) `basic` `mandatory` | |