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.

xfixes/Makefile.am

@@ -1,6 +1,6 @@
 noinst_LTLIBRARIES = libxfixes.la
 
-AM_CFLAGS = $(DIX_CFLAGS) @SERVER_DEFINES@ @LOADER_DEFINES@
+AM_CFLAGS = $(DIX_CFLAGS)
 
 libxfixes_la_SOURCES = 	\
 	cursor.c	\