Load the conf.mib dict from a list of filenames

def load_mib(filenames):
    """Load the conf.mib dict from a list of filenames"""
    the_mib = {'iso': ['1']}
    unresolved = {}
    for k in six.iterkeys(conf.mib):
        _mib_register(conf.mib[k], k.split("."), the_mib, unresolved)

    if isinstance(filenames, (str, bytes)):
        filenames = [filenames]
    for fnames in filenames:
        for fname in glob(fnames):
            f = open(fname)
            text = f.read()
            cleantext = " ".join(_mib_re_strings.split(" ".join(_mib_re_comments.split(text))))  # noqa: E501
            for m in _mib_re_oiddecl.finditer(cleantext):
                gr = m.groups()
                ident, oid = gr[0], gr[-1]
                ident = fixname(ident)
                oid = oid.split()
                for i, elt in enumerate(oid):
                    m = _mib_re_both.match(elt)
                    if m:
                        oid[i] = m.groups()[1]
                _mib_register(ident, oid, the_mib, unresolved)

    newmib = MIBDict(_name="MIB")
    for oid, key in six.iteritems(the_mib):
        newmib[".".join(key)] = oid
    for oid, key in six.iteritems(unresolved):
        newmib[".".join(key)] = oid

    conf.mib = newmib