release 4.0.0

[bastelfreak]

Pull Request (PR) description

This Pull Request (PR) fixes the following issues

[alexjfisher]

Is there anything else you want to do before our first release?

eg.

• README still refers to Centos 5
• Mention the migration to VP in the README
• Data types? (especially if adding them is likely to be a breaking change).

[alexjfisher]

The README mentions several deprecated parameters that will be removed in version 4.0.0.

We should remove them before releasing 4.0.0.

[dhollinger]

@alexjfisher @bastelfreak - is there anything still needed for this to get merged?

[alexjfisher]

There are still a couple of deprecated parameters that are documented as going to be removed in 4.0.0

[alexjfisher]

Here's some more info. #53

[alexjfisher]

If I'm reading all of that correctly, the plan was to remove 'traditional access control' completely in version 4.0? But that was then (2015). Do we still want to do this?

@razorsedge - Do you still think this is something that should be done? If we are to do this, before the first VP release is the ideal opportunity.

[alexjfisher]

More info in 84bab50

[alexjfisher]

Ping @ekohl
Any thoughts?

[trevor-vaughan]

@alexjfisher Please don't remove traditional access control. I agree that the new methods are best but there are still a lot of old systems out there that you may break.

[alexjfisher]

@trevor-vaughan Old versions of net-snmp that don't support VACM on OSes that we support?

[Dan33l]

duplicate with #162