Fixed #9940 ("bad bug in intrusive list with safe_link (or auto_unlink) hooks")
restore header hooks to unused state
Fixed #9949 (clear header node hooks upon intrusive container destruction)
Reverted wrong commit SHA-1: 62367b52e197b1dbca5ec8ba423a2ce3bfc89790 and removed include to recently deleted "detail/clear_on_destructor_base.hpp" file.
Merge branch 'master' into augmented-bstree-pullreq
Merge branch 'augmented-bstree-pullreq' into augmented-bstree