This reverts commit 6d96493b.

In general, I think it will help us to debug issues if we have less C
code and more Ruby code.  This method can be implemented in pure Ruby,
so this commit converts it to pure Ruby.

* Custom mktime to fix issue on mac

* Remove succeeded tests from failure list

* add wrapper type helpers

* add check for _as_value suffix

* add implicit time conversion

* add duration

* add init test

* more tests

* add type check and alternative c type check

* add rational and bigdecimal

* use rb_obj_is_kind_of

* use native time check

* chain implicit conversions

* remove unused variable

* Update version number to 3.7.1

* Update version number in port_def.inc

OSX has deprecated OpenSSL, so we need to install it via Homebrew and
build against that version when we build Ruby.

* Allow bytes field to be longer than 16000 bytes

* Remove empty line

* Replace strptime with custom implementation

* Fix ruby strptime

* Fix test

* Fix ruby conformance test

* Use mktime

* Remove EmptyFieldMask from failed conformance test list

* Add conformance test for nested listvalue

* Fix upb for parsing repeated Value/ListValue

* Add failed repeated ListValue conformance test into php failure list

* Encode empty ListValue

* Update mac ruby conformance failure list

* add check for overflow

* de-nestify

* break long lines

* Fix ruby continuous tests

* Fix compatibility test

This reverts commit 37581380.

* Revert "Revert "Fix Ruby module name generation when the ruby_package option is used (#5735)""

This reverts commit bb211e85.

* add new files to Makefile.am

* add frozen checks

* Use rb_check_frozen

* Correct assertion on frozen error message

The second argument for the method assert_raise is the message
to show when the assertion fails. It does not check the error
object's message.
Add an additional assertion that does check the error's message.

* do frozen check first

* example with extra enum method

* update expected test output

* slight simplification

* add test for generated enum helpers

* move const helpers to c extension

* more explicit test

* more explicit test

* indent

* add foo test

* add check for _const suffix

* Update version number to 3.7.0

* Add php/releash.sh to Makefile.am

* Make cpp_distcheck exit on fail

This reverts commit 9638dcc3.

* fix module name generation and add tests

* fix existing tests

* support both package name styles

* add check for overflow

* de-nestify

* break long lines

* let repeated fields push arrays

* add varargs push

* better test