| Features | |
| * Add utility functions to manipulate mbedtls_ecp_keypair objects, filling | |
| gaps made by making its fields private: mbedtls_ecp_set_public_key(), | |
| mbedtls_ecp_write_public_key(), mbedtls_ecp_keypair_calc_public(), | |
| mbedtls_ecp_keypair_get_group_id(). Fixes #5017, #5441, #8367, #8652. |