subversion: updated to 1.14.3

Version 1.14.3

User-visible changes:
- Client-side bugfixes:
  * Fix svn:mergeinfo diff parser bug when parsing forward merges
  * Fix redirected URL handling with file externals

- Server-side bugfixes:
  (none)

Developer-visible changes:
  * swig-rb: Fix uses of 'File.exist?', deprecated since Ruby 2.1
  * Build: Fix uses of deprecated Python APIs
  * Build: Retain ability to build SWIG Python 2 bindings
  * Fix reading WC lock status with svn_wc_status2_t
  * JavaHL: Add @Deprecated to silence compiler warnings
  * JavaHL: Fix crash in case of null message in getMessage
  * Fix build breakage of release tarballs by installed swig
  * Add regression test for issue 4711 "invalid xml file"
  * swig-py: Fix building with SWIG 4.1.0
  * Makefile.in: Fix cleaning of __pycache__ dirs and *.pyc
  * swig-py: Avoid deprecated options to SWIG >= 4.1.0
  * swig-py: Use sysconfig to allow building with Python 3.12
  * INSTALL: Document not to use SVN with APR 1.7.3 on Windows
  * Fix test suite broken by syntax error when --enable-sasl
  * swig-py: Improve error when no external diff
  * autogen.sh: Fix building when Python is not named "python"

(adam)