[ruby/openssl] Add support for gets(chomp: true).

https://github.com/ruby/openssl/commit/8aa3849cff

ext/openssl/lib/openssl/buffering.rb

@@ -229,7 +229,7 @@ module OpenSSL::Buffering
   #
   # Unlike IO#gets the separator must be provided if a limit is provided.
 
-  def gets(eol=$/, limit=nil)
+  def gets(eol=$/, limit=nil, chomp: false)
     idx = @rbuffer.index(eol)
     until @eof
       break if idx
@@ -244,7 +244,11 @@ module OpenSSL::Buffering
     if size && limit && limit >= 0
       size = [size, limit].min
     end
-    consume_rbuff(size)
+    line = consume_rbuff(size)
+    if chomp && line
+      line.chomp!(eol)
+    end
+    line
   end
 
   ##

test/openssl/test_pair.rb

@@ -115,6 +115,17 @@ module OpenSSL::TestPairM
     }
   end
 
+  def test_gets_chomp
+    ssl_pair {|s1, s2|
+      s1 << "line1\r\nline2\r\nline3\r\n"
+      s1.close
+
+      assert_equal("line1", s2.gets("\r\n", chomp: true))
+      assert_equal("line2\r\n", s2.gets("\r\n", chomp: false))
+      assert_equal("line3", s2.gets(chomp: true))
+    }
+  end
+
   def test_gets_eof_limit
     ssl_pair {|s1, s2|
       s1.write("hello")