chore: Backlog update.

 - Removes googleapis#110, googleapis#803, googleapis#1038 and googleapis#1451
 - Adds googleapis#5325

BACKLOG.md

@@ -7,12 +7,7 @@ corresponding issues open, but we'll reopen the issue if we revisit
 the request and want to put work into it.
 
 
-## Write correlation-id with log entry metadata
-
-- Issue: [#1038](https://github.com/googleapis/google-cloud-dotnet/issues/1038)
-- Status: Further investigation and more details required.
-
-## Make ValueSerializer public (Firestore)
+## Firestore: Make ValueSerializer public
 
 - Issue: [#1818](https://github.com/googleapis/google-cloud-dotnet/issues/1709)
 - Status: For consideration when everything is very stable. Making
@@ -23,81 +18,71 @@ the request and want to put work into it.
 - Issue: [#1709](https://github.com/googleapis/google-cloud-dotnet/issues/1709)
 - Status: Further investigation required. We already have
   some analysis in the form of custom Roslyn analyzers.
-
-## Storage client-side encryption
 
-- Issue: [#1451](https://github.com/googleapis/google-cloud-dotnet/issues/1451)
-- Status: More details required.
-
 ## Provide F# samples
 
 - Issue: [#682](https://github.com/googleapis/google-cloud-dotnet/issues/682)
 - Status: "Nice to have" but significant investment in terms of
   infrastructure/planning.
 
-## Detect dev/non-dev environment in diagnostic libraries
+## Diagnostics: Detect dev/non-dev environment
 
 - Issue: [#829](https://github.com/googleapis/google-cloud-dotnet/issues/829)
 - Status: More consideration and customer feedback required.
 
-## Dispose of ErrorReportingExceptionFilter
-
-- Issue: [#803](https://github.com/googleapis/google-cloud-dotnet/issues/803)
-- Status: Resources are alive as long as the application is anyway.
-
-## Allow BigQuery Struct parameters to be specified
+## BigQuery: Allow Struct parameters to be specified
 
 - Issue: [#500](https://github.com/googleapis/google-cloud-dotnet/issues/500)
 - Status: No customer requests for this yet; can implement when
   required.
 
-## Improve handling of Markdown from protos
-
-- Issue: [#110](https://github.com/googleapis/google-cloud-dotnet/issues/110)
-- Status: Ideally, protoc should do this. Massive work item, no
-  funding right now.
-
-## Better handling of compressed Storage objects when compression is disabled
+## Storage: Better handling of compressed objects when compression is disabled
 
 - Issue: [#1784](https://github.com/googleapis/google-cloud-dotnet/issues/1784)
 - Status: Both proposed options need server changes in some form or other.
 
-## Log exceptions thrown in TimedBuffer
+## Diagnostics: Log exceptions thrown in TimedBuffer
 
 - Issue: [#2182](https://github.com/googleapis/google-cloud-dotnet/issues/2182)
 - Status: We don't have a good solution for where to log these. Won't affect clients directly.
 
-## Create an unmanaged tracer in Google.Cloud.Diagnostic.Common
+## Diagnostics: Create an unmanaged tracer in Google.Cloud.Diagnostic.Common
 
 - Issue: [#2166](https://github.com/googleapis/google-cloud-dotnet/issues/2166)
 - Status: We haven't received interest for this feature.
 
-## Expose Tracing, Error Reporting and Logging common parts in a consumable way.
+## Diagnostics: Expose Tracing, Error Reporting and Logging common parts in a consumable way.
 
 - Issue: [#2164](https://github.com/googleapis/google-cloud-dotnet/issues/2164)
 - Status: This might not be a good idea, especially with OpenCensus integration coming up.
 
-## Including information stored in System.Exception.Data in the Stackdriver Error Reporting entry.
+## Diagnostics: Including information stored in System.Exception.Data in the Stackdriver Error Reporting entry.
 
 - Issue: [#2738](https://github.com/googleapis/google-cloud-dotnet/issues/2738)
 - Status: The original requester never confirmed whether our approach solved their use case or not.
 
-# Firestore: Expose sufficient state to manually restart a Listen operation
+## Firestore: Expose sufficient state to manually restart a Listen operation
 
 - Issue: [#2513](https://github.com/googleapis/google-cloud-dotnet/issues/2513)
 - Status: Waiting for more users to request this, so we can gather suitable requirements.
 
-# Diagnostics: Refactor buffering strategies so that they can be easily combined.
+## Diagnostics: Refactor buffering strategies so that they can be easily combined.
 
 - Issue: [#2163](https://github.com/googleapis/google-cloud-dotnet/issues/2163)
 - Status: Waiting for demand on this. To be reconsidered if we decide to merge the existing Diagnostics libraries into one
 
-# Diagnostics: Make it easy to not use Stackdriver diagnostics in development
+## Diagnostics: Make it easy to not use Stackdriver diagnostics in development
 
 - Issue: [#3335](https://github.com/googleapis/google-cloud-dotnet/issues/3335)
 - Status: Waiting for demand on this. We have some ideas, but little *customer* input.
 
-# Diagnostics: Associate trace information to log entries even if the trace is not sampled.
+## Diagnostics: Associate trace information to log entries even if the trace is not sampled.
 
 - Issue: [#5384](https://github.com/googleapis/google-cloud-dotnet/issues/5384)
 - Status: Semantic breaking change. To be considered for a major version if and when we plan for one.
+
+## Log4Net: Provide an opt in mechanism to remove `(null)` valued labels, which come from unset properties.
+
+- Issue: [#5325](https://github.com/googleapis/google-cloud-dotnet/issues/5325)
+- Status: Waiting for more demand on this so we can have better requirements.
+