RFR: Add start on a section about logging [v3]

[David Holmes]

On Mon, 17 Jan 2022 15:47:00 GMT, Ludvig Janiuk <duke at openjdk.java.net> wrote:

>> It's hard to find information on how one should write logging code in Hotspot. This PR is only a first attempt at pointing the reader in the right direction, but a lot could be added in the future:
>>  * In which contexts can one not use unified logging?
>>  * How much should one log?
>>  * What other logging strategies are there?
>
> Ludvig Janiuk has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains five commits:
> 
>  - Merge branch 'master' into patch-2
>  - cleanup
>  - fix trailing whitespace
>  - fix
>  - Add start on a section about logging
>    
>    It's hard to find information on how one should write logging code in Hotspot. This PR is only a first attempt at pointing the reader in the right direction, but a lot could be added in the futute:
>     * In which contexts can one not use unified logging?
>     * How much should one log?
>     * What other logging strategies are there?

If the Developer's Guide tries to incorporate hotspot specific development/programming discussions that have nothing at all to do with general processes and are relevant only to hotspot developers, then the guide is going to be too overwhelming and harder to use for the rest of the OpenJDK Developer community IMO. YMMV.

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PR: https://git.openjdk.java.net/guide/pull/70