site_country_country_list() function provided by site_country module.
Added in a hook_form_alter() on the system_site_settings form so we can update
the country_code_country table if a new site default country is set on
admin/settings/site-information.
Now preventing users from the deleting the last (and hence default) country -
both by removing the 'delete' link and by preventing the operation.

with the site default country set by the site_country module on
admin/settings/site-information.

custom_url_rewrite_outbound() function error appeared when disabling the module.

hook_boot() issues.

Follow up to issue #309956; ensure t() is available before calling it to avoid breakage in hook_boot.

function up when we're testing the functionality behind the config changes.

Issue #326726. Fix language selection when switching countries and viewing a node with translations. New behaviour: the country switcher links to the determined best translation of the node. Then, when the new page loads, that node's language is set as the default language (provided it's valid for the country). Also, when there is a language in the session, refer to it to determine the best language to set for the new country. Retain the same base language. E.g., if switching from fr-CA to global, set the language to 'fr' (if fr is installed and enabled).

First step toward detecting which language will be set when switching countries when we are viewing a node with translations.

Changing _country_code_init_language() to always set language session var. If 'global', it will set to two digits language code.