cffi-manual: fix bitrot related to foreign libraries
cffi-manual: fix bitrot related to foreign libraries

dkochmanski/cffi,cffi/cffi,attila-lendvai/cffi,cffi/cffi,mcna/cffi,3b/cffi,dkochmanski/cffi,attila-lendvai/cffi,mcna/cffi,cffi/cffi,3b/cffi,stassats/cffi,3b/cffi,stassats/cffi,dkochmanski/cffi,stassats/cffi