Allow suppresion of source information in exception messages

[jamesagnew]

This is a follow-on from the discussion in #1151 .

Currently the JsonParser.Feature.INCLUDE_SOURCE_IN_LOCATION setting can be used to choose whether to include source information as a part of the location in JsonProcessingException.

When this is disabled, the message now includes messages such as:

at [Source: REDACTED (`StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION` disabled); line: 4, column: 18]

It would be nice to have configuration that just disables the source entirely from this text blurb, logs and messages don't have a reference to internal implementation details. Ideally this would result in messages more like:

at [line: 4, column: 18]

[pjfanning]

To be honest, I think we could just change this in 2.17 to leave out the Source: REDACTED (StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION disabled); if treamReadFeature.INCLUDE_SOURCE_IN_LOCATION is disabled. That is, I don't see the need to make this even more configurable.

[cowtowncoder]

My worry is simply that if any references are removed, by default, developers are not even aware of possibility of including source as part of Location information. And so we are going to be hit by requests to start including source to show "where is the problem?" (esp. since older versions include it, for some sources).

Put another way: reference to StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION is very much intentional hint.

[cowtowncoder]

I'd be willing to change behavior (to suppress "REDACTED" message) if there's consensus for doing so: would prefer discussion on jackson-dev (https://groups.google.com/forum/#!forum/jackson-dev) for that.

And if it were to happen that no one commented anything I'd accept that as quiet approval, given that there's +2 for proposal (and I'm on the fence).