minfds is not be set as the soft RLIMIT_NOFILE when system soft RLIMIT_NOFILE greater than minds

[xiezhenye]

in options.py 1392:1414
ServerOptions.set_rlimits

    for limit in limits:

        min = limit['min']
        res = limit['resource']
        msg = limit['msg']
        name = limit['name']
        name = name # name is used below by locals()

        soft, hard = resource.getrlimit(res)

        if (soft < min) and (soft != -1): # -1 means unlimited
            if (hard < min) and (hard != -1):
                # setrlimit should increase the hard limit if we are
                # root, if not then setrlimit raises and we print usage
                hard = min

            try:
                resource.setrlimit(res, (min, hard))
                msgs.append('Increased %(name)s limit to %(min)s' %
                            locals())
            except (resource.error, ValueError):
                self.usage(msg % locals())
    return msgs

line 1402: if (soft < min) and (soft != -1): should not be present.

minfds is used to cleanup opened fd in Subprocess._prepare_child_fds. if system soft RLIMIT_NOFILE is greater than minds, some fd will not be closed properly, so minfds should always be set as the soft RLIMIT_NOFILE of the supervisors process.