* 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
edda0c92f5