[dw-free] ljlib.pl should autodetect ARCH32

[fu]

[commit: http://hg.dwscoalition.org/dw-free/rev/d9e05e2ed2ea]

http://bugs.dwscoalition.org/show_bug.cgi?id=3425

Automatically detect whether we are on 32-bit or 64-bit architecture,
instead of setting a manual config flag (thanks mmmpork for pointing this
out!)

Patch by fu and pauamma.

Files modified:

• cgi-bin/ljdefaults.pl
• doc/config-private.pl.txt

( Diff: 2 files changed. )