Xquartz: build Xquartz man pages using XORG_MANPAGE_SECTIONS

Nothing requires the use of a C preprocessor
Using standard file extensions (.man)
Use standard directory and makefile

Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Rémi Cardona <remi@gentoo.org>
Signed-off-by: Gaetan Nadon <memsize@videotron.ca>
Signed-off-by: Keith Packard <keithp@keithp.com>

hw/xquartz/doc/Makefile.am

@@ -1,16 +1,13 @@
 appmandir = $(APP_MAN_DIR)
-appman_PRE = Xquartz.man.pre
-appman_PROCESSED = $(appman_PRE:man.pre=man)
-appman_DATA = $(appman_PRE:man.pre=@APP_MAN_SUFFIX@)
+appman_PRE = Xquartz.man
+appman_DATA = $(appman_PRE:man=$(APP_MAN_SUFFIX))
 
-CLEANFILES = $(appman_PROCESSED) $(appman_DATA)
+EXTRA_DIST = $(appman_PRE)
+CLEANFILES = $(appman_DATA)
+SUFFIXES = .$(APP_MAN_SUFFIX) .man
 
-include $(top_srcdir)/cpprules.in
-
-MANDEFS += -D__laucnd_id_prefix__=$(LAUNCHD_ID_PREFIX)
+# String replacements in MAN_SUBSTS now come from xorg-macros.m4 via configure
+MAN_SUBSTS += 	-e 's|__laucnd_id_prefix__|$(LAUNCHD_ID_PREFIX)|g'
 
 .man.$(APP_MAN_SUFFIX):
-	$(AM_V_at)cp $< $@
-
-EXTRA_DIST = \
-	Xquartz.man.pre
+	$(AM_V_GEN)$(SED) $(MAN_SUBSTS) < $< > $@