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.
- add a PHP interface for lookup_account()
- PHP interfaces return error number as well as message
(messages change; numbers don't)
- using symbolic error codes instead of hardwired numbers in PHP code
- Batches now have optional "expire time".
If this time passes and the batch is not retired, abort and retire it.
- Add script "expire_batches" which enforces the above.
Run it as a periodic task.
- Add a web RPC for setting the expire time of a batch
(it can be changed multiple times)
- Add a C++ interface for this RPC
- Add a BOINC_SET_LEASE command to the BOINC GAHP
("lease" is Condor term for expire time)
David Anderson