Add support for S3 bucket_owner_full_control ACL

Fixes #87

Author: dvdmelamed

lib/logstash/outputs/s3.rb

@@ -67,7 +67,7 @@
 #      size_file => 2048                        (optional) - Bytes
 #      time_file => 5                           (optional) - Minutes
 #      format => "plain"                        (optional)
-#      canned_acl => "private"                  (optional. Options are "private", "public_read", "public_read_write", "authenticated_read". Defaults to "private" )
+#      canned_acl => "private"                  (optional. Options are "private", "public_read", "public_read_write", "authenticated_read", "bucket_owner_full_control". Defaults to "private" )
 #    }
 #
 class LogStash::Outputs::S3 < LogStash::Outputs::Base
@@ -100,7 +100,7 @@ class LogStash::Outputs::S3 < LogStash::Outputs::Base
   config :restore, :validate => :boolean, :default => false
 
   # The S3 canned ACL to use when putting the file. Defaults to "private".
-  config :canned_acl, :validate => ["private", "public_read", "public_read_write", "authenticated_read"],
+  config :canned_acl, :validate => ["private", "public_read", "public_read_write", "authenticated_read", "bucket_owner_full_control"],
          :default => "private"
 
   # Specifies wether or not to use S3's AES256 server side encryption. Defaults to false.