Some command line options does not work

[tagomoris]

Some configuration parameters exist both in command line options and system config.
For example, --suppress-repeated-stacktrace, --suppress-config-dump (and now i'm adding --workers).

Engine and other codes (in worker process) refers system_config object to handle these configuration values.
But Supervisor doesn't merge its configuration values (in instance variables) into system config object. So Engine.system_config has values just from <system> section in configuration files.

This causes that some command line options doesn't work as expected.

$ bundle exec bin/fluentd -c example/suppress_config_dump.conf --suppress-config-dump
{:here=>"suppress_config_dump", :value=>true}
2016-12-22 19:49:15 +0900 [info]: reading config file path="example/suppress_config_dump.conf"
2016-12-22 19:49:15 +0900 [info]: starting fluentd-0.14.10 pid=20088
2016-12-22 19:49:15 +0900 [info]: spawn command to main:  cmdline=["/Users/tagomoris/.rbenv/versions/2.3.1/bin/ruby", "-Eascii-8bit:ascii-8bit", "-rbundler/setup", "bin/fluentd", "-c", "example/suppress_config_dump.conf", "--suppress-config-dump", "--under-supervisor"]
2016-12-22 19:49:15 +0900 [info]: reading config file path="example/suppress_config_dump.conf"
2016-12-22 19:49:15 +0900 [info]: starting fluentd-0.14.10 without supervision pid=20117
2016-12-22 19:49:15 +0900 [info]: gem 'fluentd' version '0.14.10'
2016-12-22 19:49:15 +0900 [info]: adding match pattern="data.*" type="stdout"
2016-12-22 19:49:15 +0900 [info]: using configuration file: <ROOT>
  <system>
  </system>
  <match data.*>
    @type stdout
  </match>
</ROOT>
2016-12-22 19:49:15 +0900 [info]: starting fluentd worker pid=20117 ppid=20088 worker=0

[tagomoris]

#1398 fixes this problem in v0.14.