Some XFree86 keysyms were in XKeysymDB as XF86_foo, despite really being
XF86foo.  So, if we get to the bottom of XStringToKeysym and haven't
found our XF86_foo, try it again as XF86foo.
Signed-off-by: Daniel Stone <daniel@fooishbar.org>
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>