Support SNI (Reapplying r67488)

	This fixes connecting using TLS 1.3 to imap.gmail.com

	[Fix GH-2077] [Feature #15594]

	From: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@67717 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	net/http, net/ftp: fix session resumption with TLS 1.3

	When TLS 1.3 is in use, the session ticket may not have been sent yet
	even though a handshake has finished. Also, the ticket could change if
	multiple session ticket messages are sent by the server. Use
	SSLContext#session_new_cb instead of calling SSLSocket#session
	immediately after a handshake. This way also works with earlier protocol
	versions.

	net/http, net/ftp: skip SSL/TLS session resumption tests

	Due to a bug in OpenSSL 1.1.0h[1] (it's only in this specific version;
	it was introduced just before the release and is already fixed in their
	stable branch), the callback set by SSLContext#session_new_cb= does not
	get called for clients, making net/http and net/ftp not attempt session
	resumption.

	Let's disable the affected test cases for now. Another option would be
	to fallback to using SSLSocket#session as we did before r64234. But
	since only a single version is affected and hopefully a new stable
	version containing the fix will be released in near future, I chose not
	to add such workaround code to lib/.

	[1] https://github.com/openssl/openssl/pull/5967

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@67237 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	Move autoload to toplevel

	So that classes which uses Net::HTTP with https can use OpenSSL
	namespace for example exception classes like OpenSSL::SSL::SSLError.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@66877 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	net/pop: make modified strings mutable

	Thanks to Michael Zimmerman for the bug report

	* lib/net/pop.rb: make modified strings mutable
	  [ruby-core:85210] [Bug #14416]
	* test/net/pop/test_pop.rb: new test

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@64443 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	net/imap: Fix ArgumentError in send_string_data

	Thanks to ShockwaveNN (Pavel Lobashov) for reporting the bug.
	[ruby-core:86990] [Bug #14750]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@64420 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	net/ftp: fix FrozenError in BufferedSocket

	I noticed this bug while working on something else with
	RUBYOPT=-d on, existing test cases all passed with it.

	Note: I use String.new because it is the local style, here,
	I prefer +'' (or ''.b, for a future commit)

	* lib/net/ftp.rb (BufferedSocket#read): use String.new
	* test/net/ftp/test_buffered_socket.rb (test_read_nil): new test
	  [ruby-core:84675] [Bug #14323]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@62425 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

like r59693, initialize_http_header also should raise error. [Bug #14208]

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61242 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

If uplevel keyword is given, the warning message is prepended
with caller file and line information and the string "warning: ".
The use of the uplevel keyword makes Kernel#warn format output
similar to how rb_warn formats output.

This patch modifies net/ftp and net/imap to use Kernel#warn
instead of $stderr.puts or $stderr.printf, since they are used
for printing warnings.

This makes lib/cgi/core and tempfile use $stderr.puts instead of
warn for debug logging, since they are used for debug printing
and not for warning.

This does not modify bundler, rubygems, or rdoc, as those are
maintained outside of ruby and probably wish to remain backwards
compatible with older ruby versions.

rb_warn_m code is originally from nobu, but I've changed it
so that it only includes the path and lineno from uplevel
(not the method), and also prepends the string "warning: ",
to make it more similar to rb_warn.

From: Jeremy Evans code@jeremyevans.net
Signed-off-by: Urabe Shyouhei shyouhei@ruby-lang.org


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61155 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* lib/net/http.rb: [DOC] fix typos and grammar

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