Replace almost all occurences of linkname with link_name
In an attempt to have some atomicness in these commits
this patch does a rename for the sake of consistency.
Not all were changed, but the next commit will address that.
Patch by: Sverre Rabbelier
Reviewed by: to-be-reviewed
class_prepared = object()
pre_init= object()
post_init = object()
pre_save = object()
post_save = object()
pre_delete = object()
post_delete = object()
post_syncdb = object()