Build region_list and cur_region dynamically

[ghost]

Description

Always build region_list and cur_region dynamically. This removes hardcoded query_region_list.txt file we were using as well as query_cur_region.txt prototype that we supplied.

Two things of note:

• We are currently not setting any custom region config, but we might want to do it later on to configure certain client behavior
• We are not supplying any version information or URLs for feedback/recharge/community. As GC gets ability to handle these things, we will need to add them in region config accordingly.
• Lack of version information allows client of any version with compatible protocol to connect. Client will not attempt any upgrade/downgrade activity.

Issues fixed by this PR

#664

Type of changes

• Bug fix
• New feature
• Enhancement
• Documentation

Checklist:

• My code follows the style guidelines of this project
• My pull request is unique and no other pull requests have been opened for these changes
• I have read the Contributing note and Code of conduct
• I am responsible for any copyright issues with my code if it occurs in the future.