Add a hosts file entry without jailbreaking

I have an iPad that needs to be able to connect to a server via its short hostname, e.g. http://app instead of http://app.example.com . The network it connects to assigns it a domain name other than example.com so it doesn't work automatically. Is there a way to add a hosts entry (/etc/hosts) for that server in iOS, or add the appropriate domain name to the resolver search list without jailbreaking?