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]

$ make
gcc -o client-tls-pkcs11 client-tls-pkcs11.c -Wall -I/usr/local/include -Os -L/usr/local/lib -lm -lwolfssl
client-tls-pkcs11.c: In function ‘client_tls’:
client-tls-pkcs11.c:107:17: error: ‘CA_FILE’ undeclared (first use in this function); did you mean ‘AF_FILE’?
  107 |                 CA_FILE);
      |                 ^~~~~~~
      |                 AF_FILE
client-tls-pkcs11.c:107:17: note: each undeclared identifier is reported only once for each function it appears in
client-tls-pkcs11.c: In function ‘main’:
client-tls-pkcs11.c:200:21: error: expected ‘;’ before ‘library’
  200 |     cacert = argv[1]
      |                     ^
      |                     ;
  201 |     library = argv[2];
      |     ~~~~~~~          
make: *** [Makefile:33: client-tls-pkcs11] Error 1

[JacobBarthelmeh]

Please address errors on make.