WOLFSSL_DEBUG_PRINTF() macro adapted from wolfssl_log(), refactor
wolfssl_log() to use it, and move printf setup includes/prototypes from
logging.c to logging.h;
src/ssl_load.c: add source_name arg and WOLFSSL_DEBUG_CERTIFICATE_LOADS clauses
to ProcessBuffer() and ProcessChainBuffer(), and pass reasonable values from
callers;
remove expired "Baltimore CyberTrust Root" from certs/external/ca_collection.pem
and certs/external/baltimore-cybertrust-root.pem.