Patch from Richard Boulton for large-file support. Works by using

Patch from Richard Boulton for large-file support. Works by using
fseeko/ftello and defining magic preprocessor symbols which cause
off_t to be 64 bits wide. Pass XFLAGS=-DNO_LARGE_FILES on the make
command line to build a 32-bit-only version on systems which don't
support this. (I haven't actually found such a system to test-build
on, but I _think_ it should work.)

git-svn-id: svn://svn.tartarus.org/sgt/tweak@6646 cda61777-01e9-0310-a592-d414129be87e