Turn down the verbosity with an internal config attr when parsing the schema.

This helps while developing, without memcached running we get 100,000's of logs while rendering the test environment.
Also fixes a deprecated parsing null to strlen().

app/Classes/LDAP/Schema/Base.php

@@ -11,17 +11,19 @@ use App\Exceptions\InvalidUsage;
  * All schema items have at least two things in common: An OID and a Description.
  */
 abstract class Base {
+	protected const DEBUG_VERBOSE = FALSE;
+
 	// Record the LDAP String
 	private string $line;
 
 	// The schema item's name.
-	protected ?string $name = NULL;
+	protected string $name = '';
 
 	// The OID of this schema item.
 	protected string $oid;
 
 	# The description of this schema item.
-	protected ?string $description = NULL;
+	protected string $description = '';
 
 	// Boolean value indicating whether this objectClass is obsolete
 	private bool $is_obsolete = FALSE;