Some required Application config settings have no default
values supplied, unlike the rest of Webware.
This means every webkit app must duplicate these missing
settings, or webkit will bomb.
It seems more sensible to supply reasonable defaults,
The patch below adds defaults for the missing settings.
The values are the same as those in
with two exceptions: UnknownFileTypes['CheckDate']
has been removed (since the code no longer references it),
and UnknownFileTypes['CacheContent'] is now False
(since it is almost always a waste of memory for zero