#9 Dialog - convert .free URL to f'net URI

[Anonymous]

A dialog which allows user to key or paste in a
freeweb domain, and looks up the corresponding KSK,
and finds out the secure key URI.

For instance, 'www.fred.free' exists in FreeWeb
as 'freenet:MSK@KSK@freeweb/fred//'.

Need to retrieve 'KSK@freeweb/fred', and extract its
metadata. The metadata line after the 'End' is an SSK
key - 'freenet:SSK@blahblahblah/subkey'.

Convert this to:
'freenet:MSK@SSK@blahblahblah/subkey//'.
When converted, display in another field in the dialog.