Pass down future.* options

[HenrikBengtsson]

Some of the future.* options need to be passed down / forwarded if not set otherwise (e.g. in .Rprofile on worker). For example, the following should probably be considered:

• future.global.maxSize
• future.globals.onMissing
• future.globals.method
• future.globals.resolve
• future.globals.onReference
• future.resolve.recursive

See ?future.options for all future-specific options.

Background

From #134 (comment).

So, future.global.maxSize is also not passed down. That leaves me in a pickle.
I send jobs to a Torque cluster from my local. The jobs call brms, which has a future = TRUE argument, so that each of its chains is run according to plan. But these chains are bigger than 500Mb so this fails and I cannot change it, because I cannot alter options in the futures that brms creates.
I think all future options should always be passed down.