Add method OC_Helper::serverHost()
Add method OC_Helper::serverHost()

This method returns the server host, even if the website uses one or
more reverse proxies.

bluelml/core,cernbox/core,endsguy/server,IljaN/core,Ardinis/server,Ardinis/server,lrytz/core,owncloud/core,nextcloud/server,endsguy/server,michaelletzgus/nextcloud-server,sharidas/core,pollopolea/core,jbicha/server,xx621998xx/server,cernbox/core,pixelipo/server,michaelletzgus/nextcloud-server,pollopolea/core,IljaN/core,michaelletzgus/nextcloud-server,owncloud/core,andreas-p/nextcloud-server,nextcloud/server,sharidas/core,IljaN/core,endsguy/server,pmattern/server,Ardinis/server,whitekiba/server,jbicha/server,whitekiba/server,sharidas/core,pixelipo/server,endsguy/server,pmattern/server,owncloud/core,michaelletzgus/nextcloud-server,xx621998xx/server,jbicha/server,pmattern/server,andreas-p/nextcloud-server,owncloud/core,pmattern/server,whitekiba/server,Ardinis/server,IljaN/core,andreas-p/nextcloud-server,sharidas/core,pixelipo/server,lrytz/core,bluelml/core,lrytz/core,pixelipo/server,cernbox/core,sharidas/core,pollopolea/core,pollopolea/core,andreas-p/nextcloud-server,bluelml/core,nextcloud/server,bluelml/core,xx621998xx/server,andreas-p/nextcloud-server,lrytz/core,lrytz/core,endsguy/server,IljaN/core,whitekiba/server,phil-davis/core,cernbox/core,xx621998xx/server,whitekiba/server,pollopolea/core,xx621998xx/server,cernbox/core,pixelipo/server,jbicha/server,nextcloud/server,Ardinis/server,bluelml/core,pmattern/server,jbicha/server,owncloud/core