v2.11.5: Aug 9 2023

### Regressions

- parser: Make xmlSwitchEncoding always skip the BOM
- autotools: Improve iconv check

### Bug fixes

- valid: Fix c1->parent pointer in xmlCopyDocElementContent
- encoding: Always call ucnv_convertEx with flush set to false

### Portability

- autotools: fix Python module file ext for cygwin/msys2 (Christoph Reiter)

### Tests

- runtest: Fix compilation without LIBXML_HTML_ENABLED