A folding-in of some already-ported sources (ksh, csh) mostly from Debian, and removal of GNU configure and GNU makefiles and replacing them with BSD-style makefiles.
Replacing of the automake/autoconf tools by the original Makefile scripts, and moving the BSD "make" and the /usr/share/mk scripts into a directory called build-utils. Please note that the mk scripts need to be edited to use on your system; they're highly specific to the author's setup.