Exit codes (32 bits) with the high order bit set (e.g. 0xc0000005)
were being displayed as 0xffffffffc0000005.
Also: fix some confusion between exit codes and error numbers.
BOINC doesn't use error numbers as exit codes.
The SETI@home result table is about to run out of 32-bit IDs,
so we need to move to 64-bit result IDs.
This will happen to the workunit table at some point too.
I changed the server C++ code to use the "long" type for all DB IDs
(and to use appropriate conversion codes like %lu).
"long" is 64 bit on 64-bit machines.
For uniformity I did this for all tables,
even ones (like app) that will never get big.
I chose NOT to change the DB schema for now.
The new code will work with 32-bit ID fields in the DB.
As projects approach the 32-bit limit on a table they can change
its ID field, and fields that reference this table, to BIGINT.
This is likely to happen only on the result and workunit tables.
I put functions in html/ops/db_update.php
to change the IDs of these tables.
There was a bug where, when you suspend GPU activity,
GPU jobs show as suspended but are not actually suspended.
This was because of recent changes to distinguish GPU and non-GPU coprocs.
Change things so that coprocs are by default GPUs.
If you want to declare a non-GPU coproc in your cc_config.xml,
you much put <non_gpu/> in its <coproc> element.
See http://boinc.berkeley.edu/trac/wiki/PerAppCredit
If enabled (by the <credit_by_app> config flag)
validators will maintain on a per-(app, user, credit type) basis,
and same for teams,
in new DB tables credit_user and credit_team.
This info is displayed in the web site, on user and team pages,
using project-supplied functions to generate the HTML.
Note: update_stats doesn't decay the recent-average values
for per-app credit; I'll add this if needed.