Ability to use ssl_min_version and/or ssl_max_version instead of ssl_…

…method

lib/remote_syslog_sender/tcp_sender.rb

@@ -14,6 +14,8 @@ def initialize(remote_hostname, remote_port, options = {})
       @remote_hostname = remote_hostname
       @remote_port     = remote_port
       @ssl_method      = options[:ssl_method] || 'TLSv1_2'
+      @ssl_min_version = options[:ssl_min_version]
+      @ssl_max_version = options[:ssl_max_version]
       @ca_file         = options[:ca_file]
       @verify_mode     = options[:verify_mode]
       @timeout         = options[:timeout] || 600
@@ -63,7 +65,13 @@ def connect
           end
           if @tls
             require 'openssl'
-            context = OpenSSL::SSL::SSLContext.new(@ssl_method)
+            context = OpenSSL::SSL::SSLContext.new()
+            if not (@ssl_min_version || @ssl_max_version)
+              context.min_version = @ssl_min_version
+              context.max_version = @ssl_max_version
+            else
+              context.ssl_version = @ssl_method
+            end
             context.ca_file = @ca_file if @ca_file
             context.verify_mode = @verify_mode if @verify_mode