Add ability to search/filter users by Last IP Address

Setup

• For this test, you need access to your database.
• You need a few users in your moodle.
• On the mdl_users table, search for the lastip column and update few users records adding an IP address.. can be any (192.168.1.1 and 192.168.0.1 for example). Note that users who have not yet logged in will have their last IP address set to "0.0.0.0".
• Set the "lastip" of other users to an empty string as well.

Test Last IP Address filtering.

1. Log in as admin.
   # Go to Site administration > Users > Accounts > Browse list of users
2. Click on Show more... link to expand all the filtering options.
3. Scroll down and make sure a new option Last IP address has been added.
4. Play with the various combinations of the filter operator (the select box between the Last IP address filter and the text box for the filter value) and the filter value. For example:

   Filter operator	Filter value	Expected
   contains	168	Only users with "168" on their "lastip" will be shown
   does not contain	168	Only users without "168" on their "lastip" will be shown
   is equal to	0.0.0.0	Only users with "0.0.0.0" on their "lastip" will be shown
   starts with	192.168.1	Only users with a "lastip" that starts with "192.168.1" will be shown
   ends with	0.1	Only users with a "lastip" that ends with "0.1" will be shown
   is empty	N/A text field will be disabled	Only users with an empty IP address will be shown

Note: Make sure to press "Remove all filters" after each scenario to clear the applied Last IP address filter.