get rid of XFree86LOADER, XFree86Server, XFree86Module, and IN_MODULE

Get rid of almost all uses of these definitions.  They're still defined for
delinquent out-of-tree drivers, and also for the Mesa build.  As well as
for miinitext.c.  But largely gone.

hw/xnest/Makefile.am

@@ -52,7 +52,7 @@ Xnest_LDFLAGS =
 
 AM_CFLAGS = -DHAVE_XNEST_CONFIG_H \
             -DNO_HW_ONLY_EXTS \
-            @SERVER_DEFINES@ \
+ \
             $(XNESTMODULES_CFLAGS)
 
 EXTRA_DIST = os2Stub.c \

hw/xnest/xnest-config.h

@@ -32,6 +32,5 @@
 #include <xkb-config.h>
 
 #undef MITSHM
-#undef XFree86LOADER
 
 #endif /* XNEST_CONFIG_H */