3scale APICast logs the private URL instead of public URL.
Noticed this issue in APICast version 3.6.
Following are my observations.

• I have tested this issue in on-prem version 2.5 and confirm that APICast logs the public base URL

  [06/Oct/2020:03:07:22 +0000] api-3scale-apicast-staging.apps.tkonishiocp311.lab.upshift.rdu2.redhat.com:8080 10.130.0.1:40476 "GET /?user_key=d34fe194ed7e29af76bf8a428c01abb4 HTTP/1.1" 200 730 (0.138) 0.008
  

• When I tested in on-prem version 2.6 and I have notice

   [06/Oct/2020:05:22:56 +0000] echo-api.3scale.net:8080 10.116.0.1:39956 "GET /?user_key=8961d766cd0c936d07dc4cefb72fc913 HTTP/1.1" 200 859 (1.051) 0
  

• It is also interesting that when I put the Liquid debug policy before the APICast policy I can see the public URL getting logged in version 2.6

   [06/Oct/2020:05:56:49 +0000] api-3scale-apicast-staging.apps-crc.testing:8080 10.116.0.1:33054 "GET /?user_key=8961d766cd0c936d07dc4cefb72fc913 HTTP/1.1" 200 6622 (0.070) 0.017
  

• My guess is APICast policy is doing something different in 3scale version 2.6(APICast version 3.6).
• Also notice that only `host` variable gets changed to the private URL by the APICast policy. But `server_port` stays the same regardless.

Please help us understand this behavior and possibly fix this error.