Add watchdog log for failures

Proposed patch:

diff --git a/ayah/ayah.module b/ayah/ayah.module
index 96398e1..7a86056 100755
--- a/ayah/ayah.module
+++ b/ayah/ayah.module
@@ -204,6 +204,7 @@ function ayah_validate($element, &$form_state) {
   if (!$is_a_human) {
     // Wrong answer, set form error.
     form_set_error('ayah_response', t("You did not pass the game."));
+    watchdog('ayah', "Failed ayah game.");
   }
 }

... with this patch, here's a Fail2ban regex that will catch it:

failregex = \|ayah\|\|.*\|Failed ayah game\.$

Hi,

Thanks for considering!

If you'd like to make this an optional setting, I think I would suggest instead of doing that, provide a setting for the watchdog severity level: https://api.drupal.org/api/drupal/includes!bootstrap.inc/function/watchd... ... Seems to me that logging success and failure is very worthwhile, but I can see where people might want to elevate failures to WATCHDOG_WARNING or WATCHDOG_ERROR instead of the default WATCHDOG_NOTICE... and make successes WATCHDOG_INFO or WATCHDOG_DEBUG.

I'm a big fan of instrumentation, especially when there's something like this happening. False positives of a CAPTCHA can be maddening to track down, so to me it's especially important to log whenever something like this blocks a post.

Cheers,
John