Pass datetime as text to DBSelect
Selected topups ValidFrom must equal the first of the current month

* If we have somehow gotten duplicate sessions and we roll over to midnight, we must not rollunder to -4G and record 4G minus the difference in usage as the new session usage. Lets record 0 instead.

* Improved logging

* Modified NAS-Port-Id to use a blank default if not defined (in the case of vpn's)

Use window name on all removes

 webgui/ajax.php                                 |    8 +-
 webgui/include/ajax/functions/AdminUserLogs.php |   80 ++++++++----------------
 webgui/include/ajax/functions/WiSPUserLogs.php  |   80 ++++++++----------------
 webgui/js/app/windows/AdminUserLogs.js          |   11 ++-
 webgui/js/app/windows/WiSPUserLogs.js           |   11 ++-
 webui/user/index.php                            |   68 ++++++++++----------
 webui/user/logs.php                             |   48 ++++++--------
 7 files changed, 131 insertions(+), 175 deletions(-)

 accounting/mod_accounting_sql.pm |   97 ++++++++++++++++++++++++++-------------
 system/mod_config_sql_topups.pm  |   36 +++++++++-----
 2 files changed, 89 insertions(+), 44 deletions(-)

Use ceil while calculating instead of on total

Note: database schema for accounting_summary has been changed

Added group attributes support

Show depleted topups