APR_HAS_LARGE_FILES and 64-bit builds

[Jeff Trawick]

Should it be on or off?  IOW, should it mean that OS LFS support for
32-bit apps such as fstat64() is used, or should it mean that APR can
handle large files?

Here's how it is chosen today:

if test "${ac_cv_sizeof_off_t}${apr_cv_use_lfs64}" = "4yes"; then
   # Enable LFS
   aprlfs=1
   AC_CHECK_FUNCS([mmap64 sendfile64 sendfilev64 mkstemp64 readdir64_r])
else
   aprlfs=0
fi