ldap_bind warning instead of error ?

Hi,

In my Projeqtor I regularly have errors from users who fail authentication :
***** ERROR ***** cause = ldap_bind() [<a href='function.ldap-bind'>function.ldap-bind</a>]: Unable to bind to server: Invalid credentials

I wanted to see quickly if there are any "real" errors in my logs, but any grep is polluted by these ldap_bind errors.

Is it possible to set these as a warning, or trace ? Then it would make it easy to see immediately if there are actual errors begin raised.

Note: an extra option would then be to have an automatic email to the site administrator whenever there is an error logged... Would that be possible ?