Code doesn't require a DecodedCert which saves on dynamic memory usage.
WOLFSSL_SMALL_CERT_VERIFY: Don't have a DecodedCert allocated and verify
certificate signature in ProcessPeerCerts as this is maximum dynamic
memory usage.
WOLFSSL_SMALL_CERT_VERIFY is enabled with 'lowresource' configuration
option.
Fix sp_clear to work with NULL parameter.
Define a new function HashId that maps to the hashing function
available.
Set MAX_CERT_VERIFY_SZ to be the maximum based on what algorithms are
compiled in.
Fix usage of MAX_CERT_VERIFY_SZ in functions sending certificate verify
messages.
d86fc2dbbe