--inline-config - doesn't work with v1

[mururu]

Check CONTRIBUTING guideline first and here is the list to help us investigate the problem.

• fluentd or td-agent version.
  v1.0.x and v0.14.x

• How to confirm it.

Add puts "#{ENV['SERVERENGINE_WORKER_ID'] || 'sup'}: #{@config_data}" between L740 and L741:
https://github.com/fluent/fluentd/blob/v1.0.2/lib/fluent/supervisor.rb#L736-L741

$ touch empty.conf
$ echo abc | bundle exec bin/fluentd -c empty.conf --inline-config -
sup:
abc
2018-01-15 15:08:42 +0900 [info]: parsing config file is succeeded path="empty.conf"
2018-01-15 15:08:42 +0900 [info]: using configuration file: <ROOT>
  abc
</ROOT>
2018-01-15 15:08:42 +0900 [info]: starting fluentd-1.0.2 pid=36926 ruby="2.4.1"
2018-01-15 15:08:42 +0900 [info]: spawn command to main:  cmdline=["/Users/yito/.rbenv/versions/2.4.1/bin/ruby", "-Eascii-8bit:ascii-8bit", "-rbundler/setup", "bin/fluentd", "-c", "empty.conf", "--inline-config", "-", "--under-supervisor"]
0:
2018-01-15 15:08:43 +0900 [info]: gem 'fluentd' version '1.0.2'
...

[ganmacs]

#2708 fixed this issue.