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	unixsocket.c: abstract namespace

	* ext/socket/unixsocket.c (unixsock_path_value): fix r62991 for
	  Linux abstract namespace.

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	unixsocket.c: check NUL bytes

	* ext/socket/unixsocket.c (rsock_init_unixsock): check NUL bytes.
	  https://hackerone.com/reports/302997

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	[Backport #13935]


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	socket.c: null byte at Socket.getnameinfo

	* ext/socket/socket.c (sock_s_getnameinfo): check null byte.
	  patched by tommy (Masahiro Tomita) in [ruby-dev:50286].
	  [Bug #13994]

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	date_core.c: defensive code

	* ext/date/date_core.c (f_cmp): check comparison failure.

	* ext/date/date_core.c (d_lite_step): deal with the comparison
	  result more defensively.  [ruby-core:85796] [Bug #14549]

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	patched by Kazuki Yamaguchi <k@rhe.jp>

	bio: prevent possible GC issue in ossl_obj2bio()

	Prevent the new object created by StringValue() from being GCed.
	Luckily, as none of the callers of ossl_obj2bio() reads from the
	returned BIO after possible triggering GC, this has not been a real
	problem.

	As a bonus, ossl_protect_obj2bio() function which is no longer used
	anywhere is removed.

	merge https://github.com/ruby/openssl/commit/f842b0d5c5e37527c11954a4b7a98c8d9cc57865
	patched by Kazuki Yamaguchi <k@rhe.jp>

	bio: do not use the FILE BIO method in ossl_obj2bio()

	Read everything from an IO object into a String first and use the
	memory buffer BIO method just as we do for String inputs.

	For MSVC builds, the FILE BIO method uses the "UPLINK" interface that
	requires the application to provide OPENSSL_Applink() function. For us,
	the "application" means ruby.exe, in which we can't do anything. As a
	workaround, avoid using the FILE BIO method at all.

	Usually private keys or X.509 certificates aren't that large and the
	temporarily increased memory usage hopefully won't be an issue.

	ext/openssl/ossl_version.h (OpenSSL::VERSION): bump to 1.1.1.


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	ext: check if null byte is contained

	[ruby-dev:50267] [Bug #13953]

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	date_core.c: fix error in DateTime docs

	* ext/date/date_core.c: [DOC] fix format string for DateTime#rfc3339.
	  Reported by Andreas Rayo Kniep.  [ruby-core:68418] [Bug #10936]

	* ext/date/date_core.c: [DOC] ditto for DateTime#iso8601 and
	  DateTime#xmlschema; other small improvements.

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  fixable on 64bit mswin/mingw.

* ext/date/date_core.c (d_lite_hash): ditto.
  [Backport #13877]

* ext/openssl/ossl_bn.c (ossl_bn_hash): ditto.


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