add ssl and verify_ssl options for https connection.
add option "service" for tag_for
Merge branch 'master' of https://github.com/giraffi/fluent-plugin-growthforecast into https
fix more simple code
add support URI escaped path for test dummy server
fix to uri escape whole request path, and add its test
v0.1.5
v0.1.6: fix dependency
fix to enable keepalive as default
fix to set header "Connection: Keep-Alive"
v0.2.0
v0.2.1: fix to use resolve-hostname for cached resolver
v0.2.2: fix dependency of resolve-hostname as 1.9.3 ready