More changes to minimize dynamic memory usage.

Change define to WOLFSSL_MEMORY_LOG.
Fix for ED25519 server certificate - single cert to allow comparison
with ECC dynamic memory usage.
Free memory earlier to reduce maximum memory usage in a connection.
Make MAX_ENCODED_SIG_SZ only as big as necessary.
Change memory allocation type in sha256 from RNG to DIGEST.
If we know the key type use it in decoding private key

certs/ed25519/include.am

@@ -23,6 +23,7 @@ EXTRA_DIST += \
          certs/ed25519/root-ed25519-priv.pem \
          certs/ed25519/server-ed25519.der \
          certs/ed25519/server-ed25519.pem \
+         certs/ed25519/server-ed25519-cert.pem \
          certs/ed25519/server-ed25519-key.der \
          certs/ed25519/server-ed25519-key.pem \
          certs/ed25519/server-ed25519-priv.der \

certs/ed25519/server-ed25519-cert.pem

@@ -0,0 +1,15 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----