fix file descriptor leaks in AF_ALG code, and fix return codes (WC_AFALG_SOCK_E, not -1) in afalg_aes.c;
fixes for sanitizer-detected forbidden null pointer args in AfalgHashUpdate() and AfalgHashCopy();
fixes for resource leaks in api.c test_wolfSSL_AES_cbc_encrypt() (missing wc_AesFree()s);
fixes for resource leaks in test.c openssl_test() (missing wolfSSL_EVP_CIPHER_CTX_cleanup());
also some local fixes for bugprone-signed-char-misuse, readability-redundant-preprocessor, and clang-diagnostic-strict-prototypes, in src/pk.c and src/ssl.c.