Enhance Voicemail Emails (#1738)

* Renamed template variable account to voicemail_id and adjusted all
templates
* Added ${voicemail_description}
* Added ${voicemail_name_formatted} (will render the voicemail identifier in accordance with Default/Domain Settings > Voicemail > display_domain_name)
* Updated templates to be consistent spacing
* Updated templates to include use of ${voicemail_name_formatted}
* Changed ${account} to be voicemail_name_formatted instead of id

core/default_settings/app_defaults.php

@@ -364,6 +364,13 @@ if ($domains_processed == 1) {
 		$array[$x]['default_setting_value'] = '90';
 		$array[$x]['default_setting_enabled'] = 'true';
 		$array[$x]['default_setting_description'] = 'Maximum length of a voicemail greeting (in seconds).';
+		$x++;
+		$array[$x]['default_setting_category'] = 'voicemail';
+		$array[$x]['default_setting_subcategory'] = 'display_domain_name';
+		$array[$x]['default_setting_name'] = 'boolean';
+		$array[$x]['default_setting_value'] = 'true';
+		$array[$x]['default_setting_enabled'] = 'false';
+		$array[$x]['default_setting_description'] = 'Enable display of @domain_name after voicemail_id when rendering emails.';
 
 	//get an array of the default settings
 		$sql = "select * from v_default_settings ";