Given the explanation from the Security section (i.e. "libmish is really made for developement purpose"), it might make more sense that telnet access is disabled by default and only enabled with something like MISH_ON=1.
Otherwise, this becomes yet another thing to disable upon deployment, chances are people will forget they used this during development and production code will get deployed without the variable to disable telnet.
Otherwise, this becomes yet another thing to disable upon deployment, chances are people will forget they used this during development and production code will get deployed without the variable to disable telnet.