* will add their own input/output filters to the chain.
*/
#if AP_MODULE_MAGIC_AT_LEAST(20110619,0)
/* For 2.4 a NULL sbh pointer should work. */
sbh = NULL;
#else
/* For 2.2 a dummy sbh pointer is needed. */
ap_create_sb_handle(&sbh, p, -1, 0);
#endif
c = (conn_rec *)apr_pcalloc(p, sizeof(conn_rec));