Unit tests should disable sending email before they execute, we don't want any accidental emails sent when developers are

running the unit tests to verify functionality. Add commented out example code that will enable developers to disable email via
a define in include/config.php

include/mail.php

@@ -3,6 +3,11 @@ require_once(BASE."include/config.php");
 
 function mail_appdb($sEmailList,$sSubject,$sMsg)
 {
+    // NOTE: For AppDB developers: If email is disabled return from this function
+    //  immediately. See include/config.php.sample for information
+    if(defined("DISABLE_EMAIL"))
+        return;
+
     $sHeaders  = "MIME-Version: 1.0\r\n";
     $sHeaders .= "From: AppDB <".APPDB_OWNER_EMAIL.">\r\n";
     $sHeaders .= "Reply-to: AppDB <".APPDB_OWNER_EMAIL.">\r\n";