Add in client examples that use PKCS11.

[anhu]

No description provided.

[JacobBarthelmeh]

Warnings on build:

client-tls-pkcs11-ecc.c: In function ‘client_tls’:
client-tls-pkcs11-ecc.c:49:24: warning: unused variable ‘shutdown’ [-Wunused-variable]
   49 |     int                shutdown = 0;
      |                        ^~~~~~~~
client-tls-pkcs11-ecc.c:46:24: warning: unused variable ‘size’ [-Wunused-variable]
   46 |     socklen_t          size = sizeof(servAddr);
      |                        ^~~~
gcc -o client-tls-pkcs11-rsa client-tls-pkcs11-rsa.c -Wall -I/usr/local/include -Os -L/usr/local/lib -lm -lwolfssl
client-tls-pkcs11-rsa.c: In function ‘client_tls’:
client-tls-pkcs11-rsa.c:49:24: warning: unused variable ‘shutdown’ [-Wunused-variable]
   49 |     int                shutdown = 0;
      |                        ^~~~~~~~
client-tls-pkcs11-rsa.c:46:24: warning: unused variable ‘size’ [-Wunused-variable]
   46 |     socklen_t          size = sizeof(servAddr);
      |                        ^~~~

When updating the pkcs11 examples please touch up all the cases of :

 1125 |     unsigned char exp_sha512[SHA512_DIGEST_SIZE] = {
      |                              ^~~~~~~~~~~~~~~~~~
      |                              WC_SHA512_DIGEST_SIZE

[JacobBarthelmeh]

please update the copyright year