OpenAPI relative server URL

[DemonicTutor]

ServerImpl uses new URL() which does not allow for relative paths.

Version

5.0.0.CR5

Context

We deploy microservices on random ports which also serve swagger-ui individually. (eg: https://192.168.1.217:44913/api.html)

for this to work we need to be able to define swagger.yaml:

openapi: 3.0.1
info:
  title: api
servers:
  - url: /v1/api

and swagger-ui uses the current location (scheme+host+port) to execute requests