Update nload to 0.7.0, based on maintainer update request in PR 38461.
While here, marked as DESTDIR ready.

Changes since 0.6.0

- Abort configure script if ncurses is not found
- Rewrite the linux proc devreader
- Implement hpux device detection
- Implement reading and writing of config files
  (fixes debian bug #247030)
- Add F5 and F6 key shortcuts for reading and writing current settings
- Change defaults for traffic units to human readable
- Make shown devices configurable at run time and
  save this setting as well
- Remove "-t 0"
- Change key shortcuts, especially F2 for the option window
- Replace "average smoothness" by average window period in seconds
- Apply patch by Paul Brook <paul@nowt.org> so that
  nload works correctly on 64-bit kernels
- Fix SIGSEGV when /proc/net/dev doesn't exist
- Make compilation work with GCC 4.3 (fixes debian bug #417449)

(obache)