optional use of local lua path/cpath for remote processes

[caldweln]

When calling addremote/sfork combination to run a process at a remote location, along with 'ip', 'protocol', and 'lua' and optional 'env' is available.

If set to env='remote' in the addremote arg table, lua execution on the remote site does not take the local values for package.path and package.cpath

Otherwise, execution as before.