Description of problem:
The following error occurs when creating PortconProtocol object with SCTP:

ValueError: 132 is not a valid PortconProtocol

This causes "sepolicy manpage" to crash when SCTP portcon definitions are used.

Version-Release number of selected component (if applicable):
setools-4.1.1-6

How reproducible:
Try to run build selinux policy containing SCTP portcon definitions.

Steps to Reproduce:
$ fedpkg clone selinux-policy
$ git checkout master
$ fedpkg build

Actual results:
ValueError: 132 is not a valid PortconProtocol

Full traceback:
Traceback (most recent call last):
  File "/usr/bin/sepolicy", line 694, in <module>
    args.func(args)
  File "/usr/bin/sepolicy", line 354, in manpage
    m = ManPage(domain, path, args.root, args.source_files, args.web)
  File "/usr/lib/python3.6/site-packages/sepolicy/manpage.py", line 389, in __init__
    self.portrecs = sepolicy.gen_port_dict()[0]
  File "/usr/lib/python3.6/site-packages/sepolicy/__init__.py", line 842, in gen_port_dict
    for i in info(PORT):
  File "/usr/lib/python3.6/site-packages/sepolicy/__init__.py", line 218, in <genexpr>
    } for x in q.results())
  File "/usr/lib64/python3.6/site-packages/setools/policyrep/netcontext.py", line 186, in protocol
    return PortconProtocol(self.qpol_symbol.protocol(self.policy))
  File "/usr/lib64/python3.6/enum.py", line 291, in __call__
    return cls.__new__(cls, value)
  File "/usr/lib64/python3.6/enum.py", line 533, in __new__
    return cls._missing_(value)
  File "/usr/lib64/python3.6/enum.py", line 546, in _missing_
    raise ValueError("%r is not a valid %s" % (value, cls.__name__))
ValueError: 132 is not a valid PortconProtocol


Expected results:
Build succeeds.

Additional info: