Remove pointless storing of the protocol as a string within the connectdata

struct, and instead use the already stored string in the handler struct.

lib/ldap.c

@@ -200,7 +200,7 @@ static CURLcode Curl_ldap(struct connectdata *conn, bool *done)
   }
 
   /* Get the URL scheme ( either ldap or ldaps ) */
-  if(Curl_raw_equal(conn->protostr, "LDAPS"))
+  if(conn->protocol & PROT_SSL)
     ldap_ssl = 1;
   infof(data, "LDAP local: trying to establish %s connection\n",
           ldap_ssl ? "encrypted" : "cleartext");