The session cookie's Partitioned attribute was set to "" for any
non-null value, so an explicit `partitioned=false` was rendered the
same as `true`. PropertyMapper.to() only filters null, so
Boolean.FALSE reached the consumer and the attribute was always set.
Use whenTrue() so the attribute is set only when partitioned is true,
leaving false and unset to fall through to the container default.
Closes gh-50781
Signed-off-by: Lee JiWon <dlwldnjs1009@gmail.com>
Spring Framework 7.0 requires a Servlet 6.1 baseline for Servlet containers.
Partial Servlet 6.1 support is available on the `main` Undertow branch,
but there isn't any milestone version available for the undertow 2.4
generation. At this stage of our 4.0 schedule, we think it's safer to drop
Undertow support now.
Closes: gh-46917
Phillip Webb
Stéphane Nicoll
Lee JiWon
Andy Wilkinson
Moritz Halbritter
Brian Clozel