Add support to specify API port + if we want to use TLS

• Add support to specify Port of menshen (default 443)
• Allow to specify if we want to use TLS to connect to menshen (default: yes)
• Rewrite code: remove pkg/bootstrap/utls.go and move it to (c *Config) getAPIClient()
• If we don't use TLS, then DNS over HTTP is disabled (assumption: we are in a dev env right now)
• Improve logging a bit (use more deb

closes #2 (closed)