Put back '-I/usr/X11R6/include'.

Make 'USING_EGL=0' the default for now.  It's causing too much confusion for
too many non-developers (which in turn wastes too much developer time).  It
is trivially overridden from the make command line.  See comments in
linux-dri.

configs/linux-dri

@@ -25,6 +25,8 @@ DEFINES = -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE \
 	-DPTHREADS -DUSE_EXTERNAL_DXTN_LIB=1 -DIN_DRI_DRIVER \
 	-DGLX_DIRECT_RENDERING -DHAVE_ALIAS
 
+X11_INCLUDES = -I/usr/X11R6/include
+
 CFLAGS   = $(WARN_FLAGS) $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES) \
 	$(ASM_FLAGS) -std=c99 -ffast-math 
 
@@ -40,12 +42,23 @@ DRI_LIB_DEPS  = $(EXTRA_LIB_PATH) -lm -lpthread -lexpat -ldl
 GL_LIB_DEPS   = $(EXTRA_LIB_PATH) -lX11 -lXext -lXxf86vm -lm -lpthread -ldl
 
 
+# This is now 0 by default since it seems to confuse the hell out of people
+# and generate a lot of extra noise on bugzilla.  If you need to build with
+# EGL, do 'make linux-dri USING_EGL=1'
+
+USING_EGL=0
+
 # Directories
+ifeq ($(USING_EGL), 1)
 SRC_DIRS = egl glx/x11 mesa glu glut/glx glw
-DRIVER_DIRS = dri
 PROGRAM_DIRS = egl
+else
+SRC_DIRS = glx/x11 mesa glu glut/glx glw
+PROGRAM_DIRS =
+endif
+
+DRIVER_DIRS = dri
 WINDOW_SYSTEM=dri
-USING_EGL=1
 
 # gamma are missing because they have not been converted to use the new
 # interface.

configs/linux-indirect

@@ -25,6 +25,8 @@ DEFINES = -D_POSIX_SOURCE -D_POSIX_C_SOURCE=199309L -D_SVID_SOURCE \
 	-D_BSD_SOURCE -D_GNU_SOURCE \
 	-DPTHREADS -DHAVE_ALIAS
 
+X11_INCLUDES = -I/usr/X11R6/include
+
 CFLAGS   = $(WARN_FLAGS) $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES) \
 	$(ASM_FLAGS) -std=c99 -ffast-math