Add Errno::ECONNRESET to the errors that trigger https attempt

lib/capybara/server/checker.rb

@@ -3,6 +3,8 @@
 module Capybara
   class Server
     class Checker
+      TRY_HTTPS_ERRORS = [EOFError, Net::ReadTimeout, Errno::ECONNRESET].freeze
+
       def initialize(host, port)
         @host, @port = host, port
         @ssl = false
@@ -10,7 +12,7 @@ module Capybara
 
       def request(&block)
         ssl? ? https_request(&block) : http_request(&block)
-      rescue EOFError, Net::ReadTimeout
+      rescue *TRY_HTTPS_ERRORS
         res = https_request(&block)
         @ssl = true
         res