* #630 Allow removal of prefix when proxying to another server
* #630 Rename replace to replace settings and ensure properties used in place of fields
* #630 Update replace settings type name to ProxyUrlReplaceSettings
* #630 Add admin model and update settings parser to parse new values
* Fix formatting issues
* #630 Ensure json mapping between admin model and internal model takes place
* #630 Refactor parsing and structure of extracting new proxy url
* Reduce function complexity
* #630 Fix line length issues and remove try prefix from parser methods
