Zabbix

...G...... [ZBX-9283] improve proc_info item (Windows only) to get more information about the processes

Requesting information on a process is done on a process handle. A
process handle is requested from operating system with desired access
rights. Starting from Windows Vista (major version 6) Microsoft
introduced new access right called PROCESS_QUERY_LIMITED_INFORMATION
and since then that must be used in order to retrieve information
supported by proc_info item.

Before:
- OpenProcess() was always called with PROCESS_QUERY_INFORMATION
  desired access, which caused "access denied" on newer versions of
  Windows

After:
- OpenProcess() is called with PROCESS_QUERY_INFORMATION on older
  versions of Windows (up to, including Windows XP and Server 2003)
  and PROCESS_QUERY_LIMITED_INFORMATION on newer versions

[svn merge ^/branches/2.4 -c r52371]