Server has as a string:
- host
- version
- region
api1.xxx.pangramia.com-1.98-ru api2.xxx.pangramia.com-1.98-by
- Get actual list of all servers with concrete branch
- Get actual list of all servers with concrete version, branch
- Get actual list of all servers with concrete version, branch, region
- Change list of actual servers with concrete version by inlcuding some prg machines of another branch or version
- Provide one of machines from concrete list of servers
- Get request's statistic by branch after updating