Only call setExceptionBreakpoints as specified

[weinand]

The DAP spec says:

frontend sends a setExceptionBreakpoints request if one or more 'exceptionBreakpointFilters' have been defined (or if 'supportsConfigurationDoneRequest' is not defined or false)

Today we seem to call setExceptionBreakpoints always, even if no exceptionBreakpointFilters have been defined.

We should fix this with this logic:

const c: Capabilities = capabilities;
if (c.supportsConfigurationDoneRequest) {
    // newer DAP version with supportsConfigurationDoneRequest
    if (c.exceptionBreakpointFilters && c.exceptionBreakpointFilters.length > 0) {
		setExceptionBreakpoints(...);
    } else {
	    // new behavior: do not call setExceptionBreakpoints
	}
} else {
   	// old DAP version without supportsConfigurationDoneRequest
    // (old clients are relying on setExceptionBreakpoints being always called)
	setExceptionBreakpoints(...);
}