Log Message:
neon: update to 0.33.0.

Changes in release 0.33.0:
* Interface changes:
 - API and ABI backwards-compatible with 0.27.x and later
* Interface clarifications:
 - ne_locks.h: note that returned lock may have a different URI
   than the path passed to ne_lock_discover() due to added
   support for RFC 4918 "lockroot" in lock discovery
 - ne_request.h: ne_request_create() takes a "target" rather
   than a path and this can also be an absolute-URI
 - ne_request.h: never-used ne_free_hooks typedef removed
 - ne_dates.h: clarified error cases (behaviour unchanged)
 - ne_session.h: ne_session_create() 'host' must match RFC 3986
   syntax; IPv6 literal addresses must use [] brackets
* New interfaces and features:
 - added new configure flag --enable-auto-libproxy which enables
   libproxy by default for new sessions (Jan-Michael Brummer)
 - ne_locks.h: added DAV:lockroot support per RFC 4918
 - ne_ssl.h: ne_ssl_trust_default_ca() now a no-op for non-SSL sessions
 - ne_request.h: add ne_add_interim_handler() to handle interim
   (1xx) responses; headers in interim responses are now accessible
 - ne_basic.h: add ne_putbuf()
 - ne_strhash: SHA-512/256 now supported for LibreSSL 3.8+ (orbea)
 - response handling no longer applies a maximum limit on 1xx interim
   responses; an overall timeout equal to the read timeout is now
   applied if a read timeout is configured and 1XXTIMEOUT is enabled
 - ne_request.h: add NE_REQFLAG_1XXTIMEOUT
* Bug fixes:
 - test suite now works correctly on IPv6-only hosts (Jeremy Sowden)
 - fixes for building against LibreSSL (orbea)
 - ne_uri_parse() fixes for handling URI with no path and catch
   some invalid URIs which were allowed (fasticc)
 - retry requests after a 408 response on a persisted connection
 - 207 error strings are cleaned and compressed to a single line
 - fixed thread-safety in ne_rfc1123_date where gmtime_r is available
 - ne_lock_refresh() fixed to use a non-idempotent request
 - TLS name verification updated to match RFC 9110/6125, added strict
   handling of IP literals vs DNS names