experiment with numeric dir variant (tex and lua)

source/texk/web2c/luatexdir/lua/lnodelib.c

source/texk/web2c/luatexdir/lua/ltexlib.c

source/texk/web2c/luatexdir/lua/luatex-api.h

source/texk/web2c/luatexdir/lua/luatoken.w

source/texk/web2c/luatexdir/luatex_svnversion.h

source/texk/web2c/luatexdir/tex/commands.h

source/texk/web2c/luatexdir/tex/commands.w

source/texk/web2c/luatexdir/tex/directions.h

source/texk/web2c/luatexdir/tex/directions.w

source/texk/web2c/luatexdir/tex/equivalents.h

source/texk/web2c/luatexdir/tex/maincontrol.w

source/texk/web2c/luatexdir/tex/packaging.w

source/texk/web2c/luatexdir/tex/scanning.w