Plugins (and some built-in generators) have `--<lang>_opt` flag that
allows passing parameters one-by-one instead of passing them as
`--<lang>_out=<params>:<out_base>`. This PR changes protoc to
allow using `--<lang>_opt` for all (built-in) generators.

make cpp won't compile since it requires `-std=c++11` com

Signed-off-by: Asra Ali <asraa@google.com>

@haberman

Cleanup various bits of Google.Protobuf

Fix latest ArgumentException for C# extensions

* Add php 7.4 to docker image

* Use https links

* Add a proto_lang_toolchain for javalite

* fix toolchain. Swap javalite example to master repo

Fix conformance test failures for Google.Protobuf

This reverts commit f0680052.

Remove add_proto_enumdesc and get_proto_enumdesc

* Implement lazy loading of php class for proto messages

* Fix php 7.1

* Fix encode

* Fix memory leak

* Fix enum descriptor

* Update CHANGES.txt with 3.11.0-RC1 release notes (#6909)

* Revert "Make shared libraries be able to link to MSVC static runtime libraries, so that VC runtime is not required." (#6914)

* Marked update_compatibility_version.py as executable (#6916)

Remove IsInitialized checks accidentally left in MessageParser
Simplify ExtensionCollection.CrossLink

* Make reserve names map persistent

* Add DescriptorInternal to map

* Use get_msgdef_desc in encode_decode.c

* Add persistent map for ce=>def and enum=>def

* Replace get_ce_obj

* Remove get_proto_obj

* Remove obsolete fields from Descriptor and EnumDescriptor

* Add cache for descriptor php values

* Add cache for descriptors

* Fix bug

* Avoid add generated file again if it has been added

* Fix the bug upb depends on null-ended str for look up.

* Initialize generated pool impl

* Turn down old generated pool

* Add init entry flag protobuf.keep_descriptor_pool_after_request

By default, it's off. Add protobuf.keep_descriptor_pool_after_request=1 to php.ini to enable it

* Fix zts build

* Update Xcode version needed to run Kokoro tests

* Replace deprecated --no-ri --no-rdoc rubygem options with --no-document