Refactor of the verify option for processing X.509 files. Adds support for...

Refactor of the verify option for processing X.509 files. Adds support for ignoring date checks when loading a CA using the `WOLFSSL_LOAD_FLAG_DATE_ERR_OKAY` flag on `wolfSSL_CTX_load_verify_buffer_ex` and `wolfSSL_CTX_load_verify_locations_ex`.