void say(str)
string str;

void say(str,obj)
string str;
object obj;

If this_player() is set, send a message "str" to all players in the same
object (room) else to all players in the same object (room) as this_object().
This function is also used by the "say" command.
If second argument "obj" is specified, messages is sent to all except "obj".

See also write(), shout(), tell().
