Change free'd to freed for consistency
Also clarify that the user must use mbedtls_free().
Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/include/mbedtls/oid.h b/include/mbedtls/oid.h
index 49f4af5..b2f5dd1 100644
--- a/include/mbedtls/oid.h
+++ b/include/mbedtls/oid.h
@@ -471,7 +471,7 @@
* of an ASN.1 OID into its encoded form
* (e.g. "1.2.840.113549" into "\x2A\x86\x48\x86\xF7\x0D")
* On success, this function allocates oid->buf from the
- * heap. It must be free'd by the caller.
+ * heap. It must be freed by the caller using mbedtls_free().
*
* \param oid mbedtls_asn1_buf to populate with the DER-encoded OID
* \param oid_str string representation of the OID to parse