Add "dependencies" for named arguments #2

Enable named arguments to depend on each other.

Basically, the opposite of "excludes", although "dependencies" are declared one way, whereas "excludes" are mutually exclusive.

Example with doc:

// Depend on other named parameters,// for non-accumulated enum options possibly also providing space-separated values (optional).dependencies=.{"option zon",},

Implemented in 36d9514f77