git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@67938 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@67937 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@67889 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	* test/net/http/test_https.rb: Stop the error due to openssl 1.1.1h

	On some environments that uses OpenSSL 1.1.1h, the two tests now fail.

	http://rubyci.s3.amazonaws.com/android29-x86_64/ruby-master/log/20200924T062352Z.fail.html.gz
	https://github.com/ruby/ruby/runs/1159288773?check_suite_focus=true

	```
	  1) Failure:
	TestNetHTTPS#test_get [/data/data/com.termux/files/home/cb/tmp/build/202	00924T062352Z/ruby/test/net/http/test_https.rb:47]:
	<"0\x82\x03\xED0\x82\x02\xD5\xA0\x03..."> expected but was
	<"0\x82\x03\xE30\x82\x02\xCB\xA0\x03...">.
	```

	Not sure why, but verify_callback now seems to receive only SERVER_CERT
	but not CA_CERT.
	It would be good to investigate the issue furthermore, but tentatively,
	I want to stop the failures.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@67887 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

[ruby/psych] Fixing compatibility with libyaml 0.2.5

The main issue is that commas aren't allowed in local tags.  libyaml
was updated to follow the spec, and our tests were out of date.

See: https://github.com/yaml/libyaml/issues/196

https://github.com/ruby/psych/commit/3f5e520fd3

Note that this is not security fix, but need for release processs.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@67885 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	Make RbConfig::CONFIG values mutable [Bug #16738]

	As `RbConfig.expand` modifies the argument and involved `CONFIG`
	values, its values should be mutable.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@67872 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	Fixed duplicated warning

	As `command_rhs` is always a "value expression", `command_asgn`
	does not need the same check.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@67868 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	Do not turn on keyword_init for Struct subclass if keyword hash is
	 empty

	This was accidentally turned on because there was no checking for
	Qundef.

	Also, since only a single keyword is currently supported, simplify
	the rb_get_kwargs call.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@67866 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	`Regexp` in `MatchData` can be `nil`

	`String#sub` with a string pattern defers creating a `Regexp`
	until `MatchData#regexp` creates a `Regexp` from the matched
	string.  `Regexp#last_match(group_name)` accessed its content
	without creating the `Regexp` though.  [Bug #16508]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@67865 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	time.c (find_time_t): fix round-to-zero bug

	`find_time_t` did not work correctly for year older than the Epoch
	because it used C's integer division (which rounds negative to zero).

	For example, `TIme.new(1933)` returned a wrong time whose year is 1922
	in Asia/Kuala_Lumpur because there is no 00:00:00 1st Jan. 1933 in the
	time zone.

	```
	$ TZ=Asia/Kuala_Lumpur ruby -e 'p Time.new(1933)'
	1932-12-31 00:00:00 +0700
	```

	This change fixes the issue by using `DIV` macro instead of `/`.
	Now `Time.new(1933)` returns a time in 1933.

	```
	$ TZ=Asia/Kuala_Lumpur ruby -e 'p Time.new(1933)'
	1933-01-01 00:20:00 +0720
	```

	[Bug #16159]

	Added a test for [Bug #16159]


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