Allow using wolfSSL_CTX_set_default_verify_paths without WOLFSSL_SYS_CA_CERTS defined.

[kareem-wolfssl]

Description

Allow using wolfSSL_CTX_set_default_verify_paths without WOLFSSL_SYS_CA_CERTS defined. Fix NO_WOLFSSL_STUB typo.

Fixes zd#17857

Testing

Built in tests

Checklist

• [ ] added tests
• [ ] updated/added doxygen
• [ ] updated appropriate READMEs
• [ ] Updated manual and documentation