[PATCH] apache2handler memory leak fix

It's simpler to just use the ap_r* interfaces in the the handler SAPI
for 2.0, this improves network usage by allowing httpd to buffer as
necessary, and fixes a bug where ub_write is unnecessarily pmemdup'ing
the string (it could have used a transient bucket to avoid that; the
apache2filter got this right), and stops re-using an output brigade
which is now or at least will soon be a 2.0 API violation.

(this restores constant memory use for an arbitrary length response)

--- php-4.3.7/sapi/apache2handler/sapi_apache2.c.handler
+++ php-4.3.7/sapi/apache2handler/sapi_apache2.c
@@ -67,30 +67,15 @@
static int
php_apache_sapi_ub_write(const char *str, uint str_length TSRMLS_DC)
{

• apr_bucket *bucket;

• apr_bucket_brigade *brigade;
  request_rec *r;
  php_struct *ctx;

• char *copy_str;

• if (str_length == 0) {

•   return 0;
  

• }

  ctx = SG(server_context);
  r = ctx->r;

• brigade = ctx->brigade;

• copy_str = apr_pmemdup( r->pool, str, str_length);

• bucket = apr_bucket_pool_create(copy_str, str_length, r->pool, r->connection->bucket_alloc);

• APR_BRIGADE_INSERT_TAIL(brigade, bucket);

• if (ap_pass_brigade(r->output_filters, brigade) != APR_SUCCESS || r->connection->aborted) {

• if (ap_rwrite(str, str_length, r) < 0) {
  php_handle_aborted_connection();
  }

• /* Ensure this brigade is empty for the next usage. */

• apr_brigade_cleanup(brigade);

  return str_length; /* we always consume all the data passed to us. */
  }
  @@ -245,8 +230,6 @@
  php_apache_sapi_flush(void *server_context)
  {
  php_struct *ctx;

• apr_bucket_brigade *brigade;

• apr_bucket *bucket;
  request_rec *r;
  TSRMLS_FETCH();

@@ -259,20 +242,15 @@
}

r = ctx->r;

• brigade = ctx->brigade;

  sapi_send_headers(TSRMLS_C);

  r->status = SG(sapi_headers).http_response_code;
  SG(headers_sent) = 1;

• /* Send a flush bucket down the filter chain. */

• bucket = apr_bucket_flush_create(r->connection->bucket_alloc);

• APR_BRIGADE_INSERT_TAIL(brigade, bucket);

• if (ap_pass_brigade(r->output_filters, brigade) != APR_SUCCESS || r->connection->aborted) {

• if (ap_rflush(r) < 0 || r->connection->aborted) {
  php_handle_aborted_connection();
  }

• apr_brigade_cleanup(brigade);
  }

static void php_apache_sapi_log_message(char *msg)