in src/request/apache_request.c [388:402]
static void split_to_parms(ApacheRequest *req, const char *data)
{
request_rec *r = req->r;
const char *val;
while (*data && (val = my_urlword(r->pool, &data))) {
const char *key = ap_getword(r->pool, &val, '=');
req_plustospace((char*)key);
ap_unescape_url_u((char*)key);
req_plustospace((char*)val);
ap_unescape_url_u((char*)val);
apr_table_add(req->parms, key, val);
}
}