fixes #6741 rollback session timeout
refs #6698 v141 script additions to handle activity data cleanup
fix error check in migrateImport
update logging indexes sql to include activity tables
Realphabetized table list.
initialize array to avoid PHP warning
Added --force option to continue executing even if an error is encountered.
ignore duplicate key errors on target_activity insert
fixes #6740 better redirection after logout
allow increase memory limit during migration import
allow increase memory limit during migration file view
Removed unused variables.
migration import: account for records missing required fields in contact object
Using new civicrm_setting table for MailingBackend, DirectoryPreferences, and URLPreferences.  The civicrm_preferences table is deprecated.
Fixed SQL update to civicrm_navigation table for CiviMail menu/report items.
Added mailer settings (batch_limit, job_size, jobs_max).
Fixed queries for updateEmailMenu() and nullifyCiviConfig().  Only one query is allowed per call to mysql_query().
Smarter handling of fn_group_contacts for #6737.
Fixed setting of error reporting level.  Need to use & not &&.
Fixed improper call-time pass-by-reference.