Add support for configuring the default SSL/TLS protocol used by Qt's network stack through the RESINSIGHT_SSL_PROTOCOL environment variable. This provides a workaround for OpenSSL 3.x crashes on RHEL8 by allowing users to force TLS 1.2 or another protocol. Logs a warning if an invalid value is provided. Supported values include TlsV1_0, TlsV1_1, TlsV1_2, TlsV1_3, AnyProtocol, SecureProtocols, and their "OrLater" variants.