Replace old matrix stacks with new code based on struct matrix_stack.
-rw-r--r-- 54689 Make-config
-rw-r--r-- 31831 Makefile.X11
drwxr-xr-x - bin
drwxr-xr-x - docs
drwxr-xr-x - include
drwxr-xr-x - progs
drwxr-xr-x - src