Set advanced options in starting Sidekiq by Systemd

[IlkhamGaysin]

Monit conf file as an example and a template: https://github.com/seuros/capistrano-sidekiq/blob/master/lib/generators/capistrano/sidekiq/monit/templates/sidekiq_monit.conf.erb#L5

Systemd conf file command: https://github.com/seuros/capistrano-sidekiq/blob/master/lib/generators/capistrano/sidekiq/systemd/templates/sidekiq.service.capistrano.erb#L9

How to pass: https://github.com/mperham/sidekiq/wiki/Advanced-Options#the-sidekiq-configuration-file

[chenjenping]

I have already created a pull request related to this, maybe you can help improve it? #213