CoA Support

Ordering doesn't matter and it's easier to implement removal this way.

select.select() has a limitation of not being able to use file descriptors
larger than FD_SETSIZE. This causes issues when trying to use pyrad.Client
in a long-running software that is keeping a large number of connections
open.

This change converts Client to use poll() instead of select() to wait for
an incoming packet.

Fix for race condition for gigabits networks due to slow time.time()

When auth_enabled is False and acct_enabled is False, we cannot start
a listener for CoA only.

Fixes: db780ca ("add coa server support")
Fixes: 40c7eab ("historics")

The coa.py example needed to be modified for every tests of CoA, Disconnect and
when a NAS-Identifier needs to be inserted.

Example of use of this new feature:

 # start the RADIUS server
pyrad/example$ ./server.py &

 # send CoA to the RADIUS server
pyrad/example$ ./coa.py coa fooId-1234
 [server] Received an coa request
 [server] Attributes:
 [server] NAS-Identifier: [u'fooId-1234']
 [server] Acct-Session-Id: [u'1337']

 [coa] {}
 [coa] 44

 # send Disconnect to the RADIUS server
pyrad/example$ ./coa.py dis fooId-1234
 [server] Received an disconnect request
 [server] Attributes:
 [server] NAS-Identifier: [u'fooId-1234']
 [server] Acct-Session-Id: [u'1337']

 [coa] {}
 [coa] 45

This small client can listen on any port. It is usefull to
test some CoA proxies/forwarders.

It requires fixes from:
  https://github.com/vjardin6WIND/pyrad/tree/dev-coa
  Id: e8feefc ("server: listen for CoAs without auth, neither acct")

pyrad/example$ ./client-coa.py 3799 &

pyrad/example$ ./coa.py coa VincentJardinID
 [client-coa] Received a coa request 43
 [client-coa]  Attributes:
 [client-coa]  NAS-Identifier: [u'VincentJardinID']
 [client-coa]  Acct-Session-Id: [u'1337']

 [coa] {}
 [coa] 44

pyrad/example$ ./coa.py dis VincentJardinID
 [client-coa] Received a disconnect request 40
 [client-coa]  Attributes:
 [client-coa]  NAS-Identifier: [u'VincentJardinID']
 [client-coa]  Acct-Session-Id: [u'1337']

 [coa] {}
 [coa] 41

First make a function to lookup all addreses with getaddinfo, which
will return the address family to use and address (v4/v6).

Then have the BindAddress function bind to all returned addresses.

Add a test for binding to an ipv6 address.

Without this, once you run tests with:
  python setup.py test

the dependency directories show up in git status, which is a tad
annoying.

Issue 54 - Include missing LICENSE.txt in manifest

Issue 68 and 70 - Update testPktEncodeAttributes to make it pass in 3.6

Issue63 Add *.egg directories to .gitignore.

Add async Client/Server Radius

Issue 83 - Correct rtype in docstring for Client.CreateAuthPacket

DecodeIPv6Prefix and DecodeIPv6Addres function fix, ValueError zero length field name in format

Race condition fix due to slow time.time()

…avnerel-zz/pyrad into avnerel-zz-added_tlv_and_integer64_support

Closes pyradius#45: Adds support to handle packets from any host.

Fix pyrad.Client to work with more than FD_SETSIZE file descriptors

server: fix listen for CoAs without auth, neither acct , add runtime CoA+disconnect example

coa-client: emulate fake coa-client to test CoA proxies/forwarders

Issue8 - Add ipv6 bind support to the server code

- Raises exception when attribute does not exist in dictionary.
- Method to check if a dictionary contains an attribute.
- Method to check the dictionary attribute type.