Update preloaded directories, allow Emscripten runtime to exit, set MAIKO_ENABLE_NETHUB

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.

Author: nbriggs

bin/makefile-emscripten.wasm-wasm

@@ -8,16 +8,25 @@ XFLAGS = -DSDL -sUSE_SDL=2
 
 # OPTFLAGS is normally -O2.
 OPTFLAGS = -O2
-DFLAGS = $(XFLAGS) -DRELEASE=351
+DFLAGS = $(XFLAGS) -DRELEASE=351 -DMAIKO_ENABLE_NETHUB
 
 MEDLEY?=../../medley
 SYSOUT?=$(MEDLEY)/loadups/full.sysout
 
 LD = emcc
-LDFLAGS = -sUSE_SDL=2 -sASYNCIFY -sALLOW_MEMORY_GROWTH \
+LDFLAGS = -sUSE_SDL=2 -sASYNCIFY -sALLOW_MEMORY_GROWTH -sEXIT_RUNTIME=1 \
 	--preload-file $(SYSOUT)@medley/loadups/full.sysout \
-	--preload-file $(MEDLEY)/greetfiles/EMSCRIPTEN-INIT.LCOM@usr/local/lde/site-init.lisp \
-	--preload-file $(MEDLEY)/lispusers/BACKGROUND-YIELD.LCOM@medley/lispusers/BACKGROUND-YIELD.LCOM
+	--preload-file $(MEDLEY)/loadups/whereis.hash@medley/loadups/whereis.hash \
+	--preload-file $(MEDLEY)/greetfiles/MEDLEYDIR-INIT.LCOM@usr/local/lde/site-init.lisp \
+	--preload-file $(MEDLEY)/docs/@medley/docs \
+	--preload-file $(MEDLEY)/doctools/@medley/doctools \
+	--preload-file $(MEDLEY)/greetfiles/@medley/greetfiles \
+	--preload-file $(MEDLEY)/internal/@medley/internal \
+	--preload-file $(MEDLEY)/sources/@medley/sources \
+	--preload-file $(MEDLEY)/library/@medley/library \
+	--preload-file $(MEDLEY)/lispusers/@medley/lispusers \
+	--preload-file $(MEDLEY)/fonts/@medley/fonts
+
 LDELDFLAGS =
 
 OBJECTDIR = ../$(RELEASENAME)/