In zlib documentation i found this license in these two files:
Copyright: 1996, L.Peter Deutsch
Permission is granted to copy and distribute this document for any
purpose and without charge, including translations into other
languages and incorporation into compilations, provided that the
copyright notice and this notice are preserved, and that any
substantive changes or deletions from the original are clearly
I suppose it is a DFSG-compatible license ?
Anyway i fail to find it elsewhere. Is this an original one ?