Frees a name-value record.
hcerr_t hc_nvr_free(hc_nvr_t *nvr);
This function frees a name-value record that was created by hc_nvr_create.
nvr
IN: Points to the name-value-record to be freed.
HCERR_OK
HCERR_BAD_REQUEST
HCERR_OOM
HCERR_INVALID_NVR