Remove weird use of dup functions to allocate new structs
Replace shallow *_dup calls with g_memdup2 or g_new0

  For a shallow copy, it's far simpler to just call g_memdup2 directly.

  In a couple cases where most fields are replaced after, it's simpler to

  allocate a new struct entirely and just copy the one or two fields from the

  original.
Remove deep parameter from dup functions

  All callers all require deep copies now.

Compile only.