Add a way to generate a checkin_notes file based off git metadata
Optimize gitlog script
more GAHP code
Merge branch 'master' of ssh://boinc.berkeley.edu/boinc

Conflicts:
	checkin_notes
- client: if gui_rpc_auth.cfg is empty, print a warning but don't error out;
    an empty GUI RPC password is allowed.
- lib: compile fix
- add PHP script for initializing user submit priorities
  based on existing batches
VBOX: If Detection of VirtualBox fails, declare it a temporary failure and reschedule after 24-hours.

6.10 and older do not detect if VirtualBox has been installed.  If a VM job is assigned to a host running on an old client and the wrapper detects VirtualBox is not installed reschedule the job for execution at a later date.  This prevents the client from requesting excessive amounts of work which will all fail.  Eventually the job will error out when it passes its deadline.
- client: when checking file sizes at startup,
    skip image files if the "dont_verify_images" pref is set.
    Otherwise we'll downloading the file on each startup.
    From Juha.
- scheduler: add feature for deleting no-longer-used sticky files.
    Create a file "file_delete_regex" in your project dir.
    Each line is a regular expression.
    Any sticky file whose name matches one of the expressions is deleted.