fix set syntax for 2.6 compat
Merge remote-tracking branch 'kali/bug/syntax-fix' into develop
Client should download configs.json

Configs.json lists versions of service definition files.
Client should favor latest service definition config
Make sure config_version is set as string
Set config_version before loading eip config
Check if obfs is provided and enabled, feature/5841 initial commit
Backend checks if obfs can be launched, feature/5841