This change makes HTTPS access more flexible by turning certificate verification bypass into an explicit runtime option instead of hardcoding it for specific builds. In do_curl, certificate handling now uses a skipcert flag, IZ2S can point curl at a known CA bundle path when verification is enabled, and the CLI/parser/help text were updated to support -k. The commit also enables the newer radio-browser API and tightens dialog exit-code handling, so the practical effect is that ziptuner should work more reliably across older or unusual Linux environments without forcing insecure defaults for everyone.