add database table; form to enable/disable; handle form #16
enable disable white listing of user access
test the new whitelist table
add entry when whitelist is enabled; list entries
only add the current IP once
require uid as well for safety
be able to delete an entry from the whitelist
move get_ip to the Perl::Maven::WebTools module to be usable by the Admin module as well
move the mymaven function to the Perl::Maven::WebTools module
display error if e-mail could not be sent
send verification e-mail and add white-list IP address when user clicks on link