Compiling with -DMAIKO_ENABLE_NETHUB makes it possible to test out having a WebSocket
server that could pass packets back and forth to the Dodo NetHub.
Setting Emscripten link-time option for EXIT_RUNTIME allows the runtime code to shutdown
when you exit Medley via a (LOGOUT)
Set up preloads for all the parts of the Medley directory that MEDLEYDIR-INIT expects
to be there. The resulting ldesdl.data is (at this time) 128 MB. It can be installed
gzipped if using nginx or some other web server that supports pre-zipped static files.
It would be better to have these as lazy-loading files, but the setup for that is
complicated. Another alternative to embedding all the data would be if a WebSocket
to XNS/Nethub gateway were written and deployed.
Moves the full.sysout from the root of tle system to /medley/loadups/full.sysout,
adds /medley/lispusers/BACKGROUND-YIELD.LCOM and an Emscripten/WAsm specific
site init file at /usr/local/lde/site-init.lisp
Adjusts options so that the options are in the correct place for the
compiler and loader.
