BufferedIO#rbuf_fill should preserve backtrace information when raising
EOFError. Otherwise, users get confused when EOFError is leaked out from
Net::SMTP etc. [ruby-core:78550] [Bug #13018]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57311 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
use Socket.tcp_server_sockets in case localhost is resolved to ::1.
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CR or LF is included in a line, because they are not allowed in
RFC5321.
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When you change this to true, you may need to add more tests.
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Net::SMTP::Response. Patch by Pawel Veselov.
[ruby-trunk - Bug #9125]
* test/net/smtp/test_smtp.rb: Test for the above.
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