Merge #455

455: Fix/454 r=metasim a=metasim

- [X] I agree to follow the project's [code of conduct](https://github.com/georust/gdal/blob/master/CODE_OF_CONDUCT.md).
- [X] I added an entry to `CHANGES.md` if knowledge of this change could be valuable to users.
---

Closes #454 


Co-authored-by: Simeon H.K. Fitch <fitch@astraea.io>

CHANGES.md

@@ -2,6 +2,12 @@
 
 ## Unreleased
 
+ - **Breaking**: `CslStringListIterator` returns a `CslStringListEntry` instead of `(String, String)` in order to differentiate between `key=value` entries vs `flag` entries.
+ - **Breaking**: `CslStringList::fetch_name_value` returns `Option<String>` instead of `Result<Option<String>>`, better reflecting the semantics of GDAL C API.
+ - Added `CslStringList::get_field`, `CslStringList::find_string`, `CslStringList::partial_find_string`, `CslStringList::find_string_case_sensitive`, `CslStringList::into_ptr`, `CslStringList::add_name_value`.
+
+   - <https://github.com/georust/gdal/pull/455>
+
  - **Breaking**: `ExtendedDataType` no longer implements `Clone`, `PartialEq` and `Eq`
 
    - <https://github.com/georust/gdal/pull/451>