Merge pull request #82 from styx-hy/develop

multiplex http parent connection
Fix for multiplexing http parent connection.
Add proxy option in config.

This option is going to unify all parent proxy configurations.
Small refactor for config parsing.
Automatic upgrade config file.
Merge branch 'feature/unify-proxy-config' into develop
Add ARMv7 binary, use full arch in binary file name.
Fix crash on windows when upgrading config.
Fix crash with 0.0.0.0 listen address on windows.
cow chain client side done.
refactor listen format in config similarly