* Fix conformance test

Default value of string/message map is not encoded

* Fix zts build

* Initialize well known type values

Also fixes #6667

* Revert unwanted change

* Initialize well known type values

Also fixes #6667

* Revert unwanted change

* Update README.md

Fixed spelling error

* Update README.md

* Add document for php development

* Fix comments

* Cherry pick changes on update_version.py #6643

* Update version to 3.10.0-rc-0

* Do not add rc0 to php packages.xml

* Sync upb

https://github.com/protocolbuffers/upb/pull/209

* Update upb

https://github.com/protocolbuffers/upb/pull/210

* Sync upb

https://github.com/protocolbuffers/upb/pull/209

* Update upb

https://github.com/protocolbuffers/upb/pull/210

* When length is zero, substr returns null instead of emptry string, which breaks the invariable for message.
* Tested in https://github.com/protocolbuffers/protobuf/pull/6560

* For missing message value, map should create a default message
instance in order to keep its invariable.
* On 32-bit platform, int64 map key should be string

* Sync upb

* https://github.com/protocolbuffers/upb/pull/208

* Fix php c extension compiling

Don't use macros defined by upb

* Update ruby conformance failure list

* Add changelog for 3.9.x

* Revert "Make php message class final to avoid mocking (#6277)" (#6324)

This reverts commit 7f84a943.
This is just temporary. Eventually, we still want to roll forward this
change. Some users are complaining they need more time to clean up their
code.

* Update extract_includes.bat.in

File io_win32.h is not in directory google\protobuf\stubs under directory google\protobuf\io

* Set oneof case in array constructor (#6351)

Forgot to set it previously.

* Update protobuf version (#6366)

* Drop building wheel for python 3.4 (#6406)

https://github.com/matthew-brett/multibuild/pull/240

* Fix binary compatibility in FieldCodec factory methods (#6380) (#6424)

* Fix binary compatibility in FieldCodec factory messages

* Make default value parameter for current factories required

* Route old methods through default value overloads

* Remove ExtensionRegistry.Add(params) overload

* Rename ExtensionRegistry.Add(IEnumerable<Extension>) overload to AddRange

* Edit naming of parameters in Extension classes

* * Fix add API warnings to docs for extension APIs
* Rename internal ExtensionSet.GetValue to TryGetValue

* Disable javadoc error (#6371)

* Disable javadoc error

Actual fixes of the javadoc will be followed up

* Remove duplicated configuration

* Update javadoc plugin version

* Updated Bazel test script to use most recent Bazel version (#6413) (#6433)

I'm not exactly sure why, but this fixes the failing Bazel presubmit
test. Using the most recent version seems like a good idea anyway so
that we can make sure we're compatible with any new Bazel changes.

* [bazel] Add fixes for --incompatible_load_{cc,java,proto}_rules_from_bzl

* No need to update version in generated code (#6471)

generate_descriptor will handle that

* Update protobuf version (#6472)

* No free when construct was not done

This fix the segfault when some other error happens

* Add more tests

* Use Sub to avoid printing too much

* compatibility tests between last released and the current version

This reverts commit 9a8ef05a.

* Make php message class final

Because proto messages are just data object, they should not be mocked.
Explicitly make them final to avoid accidental usage.

* Update generated descriptors

* php: Fixed php notices for unknown enum indices

* php: Fixed formatting of Duration

This fixes:
* Missing nanoseconds. The nanoseconds where divided as a float and
  implicitly converted to a string before being passed to bcadd.
  This can result in a float formatted in scientific/exponential notation,
  which bcmath doesn't understand.
* Durations are supposed to be formatted without trailing zeroes.

* Change int64 json encoding to be string for php and ruby

* Fix ruby test

* Sync upb change

Previously, foo_value and foo (wrapper field) will both have get/setFooValue

This reverts commit 783971e8.
Revert an accidental revert!

This reverts commit 6d96493b.

This reverts commit c40018e5.

* Custom mktime to fix issue on mac

* Remove succeeded tests from failure list