Convert ola_e131 to our flags module and do some associated work around that

Can you break this onto a separate line as well:

/*
 * @brief Create a new longname bool flag.
 *
 * By default the flag is undefined, that is is_present() returns false. If the flag is provided on the command line,
 * is_present() will be true, and operator bool() return return the value of the flag./
 */