* Set up the php server per site.
* Backwards compatibility logic for old config URLs.
* Remove php global config tab.
* Fix util import in website.conf.js
* Fix eslint fails.
* Move global php i18n keys to domain
* Remove unnecessary domains verification and set fastcgi_pass in unified mode.
* Convert return statement to logic operator in php_ustream.js
* Move php upstream to outside the server blocks
* Remove unnecessary watcher from php domain section
* Fix upstream config context and conditional append
* Separate backwards compatibility logic.
* Remove unused i18n key from php domain and update copyright of these files
* Replace all dots for underscore in php_upstream helper
* Fix missing space and remove upstream comment from php config.
* Fix selects $refs and watch the enable status for phpServer and phpBackupServer.
* Change copyright year for all modified files.
* Backwards compatibility logic for old config URLs after angularBackwardsCompatibility
* Deep merge old php global config from data url, and add safe disable for phpConfigs
* Move deep merge function to new helper
* Fix missing disable wordpressRules and convert function declaration to arrows in deep merge helper
* Fix missing css class in php domain-section
Himanshu Bhatt