Get rid of the admin/structure/contact/settings page

Revised patch with a period at the end of the contact form checkbox. Also included before & after screenshots along with a screenshot of the flood_control interface.

Missed one variable name change. Also included a screenshot of the contact page when flood control is limited and these variables are set:

variable_set('contact_threshold_limit', 5);
variable_set('contact_threshold_window', 300);

Arg...tests won't run on my machine because of the freaking cache_update table errors. Maybe this one will pass?

Revised patch now that my testing works again and this one should pass the bot. Note again I'm fully willing to support these contact flood limit/window variables in Flood control module.

Revised patch with proper variable uninstalls.

So summary review:
1: The hourly threshold, has been changed to a hidden variable, just like the login flood limit/window. I've created a new Drupal 7 module to expose an admin interface for the flood control variables at http://drupal.org/project/flood_control.
2: This variable is renamed from contact_hourly_threshold to contact_threshold_limit for consistancy with the login flood variable names. Also added another variable contact_threshold_window (default 1 hour) so we can control the amount of time that people can send e-mails.
3: The enable contact form by default for users moved to admin/config/people/accounts under a new "Contact form" fieldset.
4: Removed variable_del('contact_form_information'); from contact_uninstall() because the variable is no longer used and it is deleted in system_update_7021().

Screenshots for the new pages and the Flood control module are in #2.

Fixed 'System' in the update docs and changed it to 'Contact'.

Revised patch with default flood limits set to five messages in one hour.

Awesome. FYI I updated the Flood control module to account for both these new variables and the new default limit of 5. I should make a note of this in the upgrade docs.

There is an existing issue to cleanup the contact_help text, because there is a lot of outdated text in there. Contact info was moved to a block-only approach because of proper input formats, etc. Users upgrading should automatically get a new block called 'Contact page help' in system_update_7021().

Please followup in #599124: Cleanup contact_help()

I can't find where exactly this should be documented, so I'm marking this as fixed.