Updates for 7.0.56
- Condor integration:
    - change "query_batch" to "query_batches"; allow multiple batches
    - add "ping server" web RPC and GAHP function
    - change BoincDb::get() so that it generates XML error message if needed
- client: alphabetize log flags
MGR: Fix bugs in code which limits event log to 2000 messages
MGR: Fix bugs in code which limits event log to 2000 messages
WINSETUP: When ENABLEUSEBYALLUSERS is true, create the automatic run key in the HKEY_LOCAL_MACHINE registry space.  When it is false use HKEY_CURRENT_USER.
Merge branch 'master' of ssh://boinc.berkeley.edu/boinc