[Patch] LDAP Error reporting for 4.2.1

I'm using OpenLDAP 1.x in PHP 4.2.1, and was dismayed that $x = @ldap_add(...); dumps verbiage to stderr if the add fails, despite the "@". Figured it'd be faster to fix it than to whine and complain. In fixing, I found some inconsistency in the way errors are reported - some with explanations (e.g. a call to ldap_err2string) and some without. I removed the offending ldap_perror calls (which don't honor "@", obviously) and augmented the php_error calls. Patch attached. Oh, I couldn't find a FAQ question handy regarding patch submission, so I hope I'm not violating etiquette. At least the patch isn't enormous. :-) Kris