Add cf.nova.h for Win32 compat
Introduce context parameter for ExpandPromise

This allows to evaluate subordinate promises, which need information to be
passed from the parent one (such as ones in files_edit bundles).
De-duplicate exit paths in ScheduleEditOperation
Move edcontext out of Promise struct
Fix traversal of 'abstract' directories
Revert "Use AgentConnection *, not FileCopy.servers to check whether the network access is required"

This reverts commit eefc77537bb757a25d0823c53f533f8a7b22f5e3.