Mysterium node for IOS as Network extention POC

[ramzius]

Provide Mysterium client network extention which will be able to connect with Node.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically closed because it has not had activity for a long time. If this issue is still valid, please ping a maintainer and ask them to label it as "pinned". Thank you for your contributions.