* added POSIX definitions for XFEOF(), XFERROR(), and XCLEARERR(), currently with no-op fallbacks for !POSIX.
* added missing file handle checks in testsuite/testsuite.c:file_test() and tests/utils.h:copy_file().
* added fixes and suppression around tests/api.c:test_wolfSSL_SMIME_read_PKCS7().
* added various fixes in examples/asn1/asn1.c and examples/pem/pem.c.
asn1.c: Allow sample to build without coding (base64 decoding).
set_curves_list(): function for ECC, Ed25519, Ed448 but this block of
code is ECC only. Fixed #ifdef protection.
wolfSSL_CTX_set1_curves_list and wolfSSL_set1_curves_list also available
when Curve25519/Curve448 compiled in but not ECC.