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openssl: import v2.0.4

Import Ruby/OpenSSL 2.0.4. Only bug (and typo) fixes. The full commit
history since v2.0.3 (imported at r57482) can be found at:

https://github.com/ruby/openssl/compare/v2.0.3...v2.0.4

This contains the fix for [Bug #11033].

Jun Aruga (1):
Update .travis.yml and Dockerfile

Kazuki Yamaguchi (9):
test/test_pkey_ec: do not use dummy 0 order
test/test_ssl: fix typo in test_sysread_and_syswrite
ssl: check return value of SSL_set_fd()
Fix typos
test/test_x509store: skip OpenSSL::TestX509Store#test_set_errors
tool/sync-with-trunk: 'LASY' -> 'LAST'
x509store: clear error queue after calling X509_LOOKUP_load_file()
extconf.rb: simplify searching libraries logic
Ruby/OpenSSL 2.0.4

SHIBATA Hiroshi (1):
Fix typos

Vladimir Rybas (1):
Fix documentation for OpenSSL::Cipher#final

nobu (2):
openssl: fix broken openssl check
openssl: fix broken openssl check

usa (1):
Search SSL libraries by testing various filename patterns

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59081 b2dd03c8-39d4-4d8f-98ff-823fe69b080e