advagg_add_dns_prefetch in ./advagg.module
Add in the dns-prefetch header for CSS and JS external files.
advagg_add_resource_hints_array in ./advagg.module
Find dns_prefetch and call advagg_add_dns_prefetch().
advagg_admin_settings_form in ./advagg.admin.inc
Form builder; Configure advagg settings.
advagg_advagg_get_info_on_files_alter in ./advagg.advagg.inc
Implements hook_advagg_get_info_on_files_alter().
advagg_generate_groups in ./advagg.inc
Group the CSS/JS into the biggest buckets possible.
advagg_mod_admin_settings_form in advagg_mod/advagg_mod.admin.inc
Form builder; Configure advagg settings.
advagg_mod_prefetch_link in advagg_mod/advagg_mod.module
Have the browser prefech this domain to open the connection.
_advagg_process_html in ./advagg.module
Replacement for template_process_html().