Based on a patch by qingdoa daoo.

Set defaults similar to Win XP for Kashida and set the default char in
ScriptGetFontProperties.

Also make sure the debug registers are properly copied to the context
when set.

Don't allocate memory for the thread error structure until it is
needed, as it is quite large and wastes memory for threads that don't
call any wininet function.

Free all pointers by default, except for conformant strings.
Conformant arrays should always be freed.
Add FC_CVARRAY to list of known types to avoid a FIXME.

Use the documented NDR_PROC_HEADER_EXTS structure instead of the
current NDR_PROC_EXTENSIONS structure currently in ndr_stubless.c.

Store the return value on the stack for stubs, as MIDL reserves space
for it and gives us a stack offset. This fixes calling methods with
thunks that assume that the return value will be stored on the stack.