Enables the library to choose whether to have patrons scan their barcodes for self checkout, or login
with username and password. Uses 'checkpw' for compatibility with LDAP authentication.
Also introduces a few new system preferences to make Self Checkout more secure and manageable:
SelfCheckTimeOut: the number of seconds before the self-checkout login times out for a patron
AllowSelfCheckReturns: indicate whether or not patrons can return materials via self-checkout
SelfCheckHelpMessage: user-configurable HTML to show specific text on the Help page.
Thank you to Marlboro College in Marlboro, VT for sponsoring and testing this development!
Signed-off-by: Nicole C. Engard <nengard@bywatersolutions.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
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