Allows easy replacing of class names in generated code using #define to redefine class names at compile time.

As per https://docs.phpdoc.org/latest/references/phpdoc/tags/return.html, the first token after the @return tag should be the return type.

Remove dead links and update the ones that were moved.

Use https when possible.

Isolate inactive projects (not updated in the last few years) in a subsection.

release notes: no

className -> class_name

This should reduce binary size slightly, small performance improvement, and improve linkage by forcing references to all used classes.

Note that this maintains backwards compatibility for sources generated by older protoc for the time being. If you want the benefits
you will need to recompile your protos with the newer protoc.

* Blacklist .proto source files is Bazel allows us to

This is a partial revert of https://github.com/protocolbuffers/protobuf/commit/7b28278c7d4f4175e70aef2f89d304696eb85ae3 to unblock, e.g., https://github.com/grpc/grpc/pull/21590 or https://github.com/lyft/envoy-mobile/issues/617 until Bazel is fixed.

Note: this is a forward-compatible change that automatically switches to the behavior intended by https://github.com/protocolbuffers/protobuf/commit/7b28278c7d4f4175e70aef2f89d304696eb85ae3 when a compatible Bazel is released without requiring users to upgrade Protobuf. We will revert this change when Bazel is fixed.

* Remove trailing ,

* Update BUILD

Merge branch 3.11.x to master

Uses https://en.wikipedia.org/wiki/Wikipedia:Lists_of_common_misspellings/For_machines to find likely typos, with https://github.com/bwignall/typochecker to help automate the checking.

Currently this is managed by the release script. We should also possibly remove the section for "Push artifacts to Maven Central"

release notes: no

* add python38

* add python3.8

* fix tox

* Add scripts to test multirequest

* chmod ug+x multirequest.sh

* Add continuous test

* Compile c extension

* Class entry is obsolete in the second request
1) Needes to use class name in persistent map
2) Invalidate class entry stored in descriptor

* Add new files to dist

* Fix compile_extension

* Cleanup outputs for phpize

Clang currently displays an error if source files generated with protoc are compiled with -Wcomma. This change fixes this as suggested by the compiler itself.

VLAs complicate static analysis and bloat stack size. Replace VLA allocation
with calls to malloc and free.  This will alos the code to build with -Wvla.

This corresponds to the newest reading of RFC 3629, and results
in the largest possible number of character entities by any
valid parser. This may result in a buffer which is oversized,
but never undersized.

This is after further discussion with acozzette in this PR;
https://github.com/protocolbuffers/protobuf/pull/6844

Signed-off-by: William A Rowe Jr wrowe@pivotal.io
Signed-off-by: Yechiel Kalmenson ykalmenson@pivotal.io

In consuming this useful string utility, it was discovered
that the interpretation of leading byte codes 0xf8-0xff
did not conform to either the RFC 3629 nor ISO/IEC 10646
definitions of utf-8.

The IETF RFC describes only 1-4 byte encodings (a limited
number of 4 byte encodings at that), and plainly states in
section 1. Introduction;
   o  The octet values C0, C1, F5 to FF never appear.

Alternately, the ISO definition "R.2 Specification of UTF-8"
preseented in the original IETF RFC 2279 clearly define the
meaning of leading byte values F5 through FD, and RFC 3629
Section 10. Security paragraph 3 calls out this alternate
reading (alterative to "never appears".) F5-F7 begin an
invalid (in the domain of unicode code points) 4-byte UTF-8
sequence (similar to F0-F4), while F8-FC begin a 5-byte
sequence, FC and FD begin a 6 byte sequence.

The curent code is wrong in that it doesn't treat the codes
F8-FF as invalid 1-byte characters, nor does it treat the
codes F8-FD as the correct number of bytes. No valid parser
will land these lead characters 4 bytes forward. Most will
treat these as the 5 or 6 byte utf-32 character and may then
treat the resulting character as invalid, while some parsers
may reject all leading F5-FF characters as a single byte of
erronious input, followed by each invalid continuation byte.

We propose the conventional reading of F8-FD as 5 and 6 byte
sequences as originally defined, while FE-FF must be read
as single byte invalid code points.
Signed-off-by: William A Rowe Jr <wrowe@pivotal.io>
Signed-off-by: Yechiel Kalmenson <ykalmenson@pivotal.io>

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 c extension portable for php 7.4

* Fix conformance tests

* Fix comments

* Fix 32-bit

* Update conformance failure list

* Fix compiler warnings

* Cleanup configure created by phpize
The file created in php 7.4 is not recognizable by previous versions

* Fix conformance tests for 64-bit php

* Fix conformance test

* Fix compile warning

* Fix compile warnings

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

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

@haberman