Initialize `@content_type` per request not per connection
Add a test of Content-Type initialization in in_http
Fix test for ruby 2.0.0
Merge pull request #400 from komamitsu/in_http_content_type

in_http: Initialize @content_type per request not per connection
add use-v0-config option
Merge pull request #431 from fluent/use-v0-config

add use-v0-config option
Merge remote-tracking branch 'upstream/master'