https://git.ruby-lang.org/ruby.git/commit/?id=828c34e58b

From 828c34e58b63d64558ec0f2d1d7ae401c5e6b21f Mon Sep 17 00:00:00 2001
From: nagachika <nagachika@r...>
Date: Tue, 29 Sep 2020 22:46:14 +0900
Subject: merge revision(s) d23d2f3f6fbb5d787b0dd80675c489a692be23e2:

	[ruby/webrick] Make it more strict to interpret some headers

	Some regexps were too tolerant.

	https://github.com/ruby/webrick/commit/8946bb38b4

diff --git a/lib/webrick/httprequest.rb b/lib/webrick/httprequest.rb
index 87dc879..6af0cee 100644
--- a/lib/webrick/httprequest.rb
+++ b/lib/webrick/httprequest.rb
@@ -226,9 +226,9 @@ module WEBrick https://github.com/ruby/ruby/blob/trunk/lib/webrick/httprequest.rb#L226
         raise HTTPStatus::BadRequest, "bad URI `#{@unparsed_uri}'."
       end
 
-      if /close/io =~ self["connection"]
+      if /\Aclose\z/io =~ self["connection"]
         @keep_alive = false
-      elsif /keep-alive/io =~ self["connection"]
+      elsif /\Akeep-alive\z/io =~ self["connection"]
         @keep_alive = true
       elsif @http_version < "1.1"
         @keep_alive = false
@@ -503,7 +503,7 @@ module WEBrick https://github.com/ruby/ruby/blob/trunk/lib/webrick/httprequest.rb#L503
       return unless socket
       if tc = self['transfer-encoding']
         case tc
-        when /chunked/io then read_chunked(socket, block)
+        when /\Achunked\z/io then read_chunked(socket, block)
         else raise HTTPStatus::NotImplemented, "Transfer-Encoding: #{tc}."
         end
       elsif self['content-length'] || @remaining_size
diff --git a/version.h b/version.h
index 7f0007e..d578e36 100644
--- a/version.h
+++ b/version.h
@@ -2,7 +2,7 @@ https://github.com/ruby/ruby/blob/trunk/version.h#L2
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 1
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 130
+#define RUBY_PATCHLEVEL 131
 
 #define RUBY_RELEASE_YEAR 2020
 #define RUBY_RELEASE_MONTH 9
-- 
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