doc: describe Iain Patterson's new feature for ICCCM compliance

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>

NEWS

@@ -66,6 +66,17 @@ tell Window Maker to just ignore them. This is done with the new setting called
 "IgnoreGtkHints", which is available in the "Expert" panel in WPrefs.
 
 
+Cooperative Window Manager Replacement
+--------------------------------------
+
+The ICCCM defines a protocol for window managers to ask to replace the currently
+running one; Window Maker now supports it. You can ask Window Maker to take the
+place of current one by running "wmaker --replace", or any other window manager
+can ask Window Maker to leave the place for them when started the same way.
+Please note that this feature must be explicitely enabled at compile time because
+by default it is not compiled in ("configure --enable-wmreplace").
+
+
 --- 0.95.6
 
 More image format supported

doc/Makefile.am

@@ -32,6 +32,7 @@ EXTRA_DIST = wmaker.in wmsetbg.in
 wmaker.1x: wmaker.in Makefile $(top_builddir)/config.h
 	$(AM_V_GEN)$(top_srcdir)/script/replace-ac-keywords.sh \
 		--header "$(top_builddir)/config.h" --filter "HAVE_INOTIFY" \
+		--filter "USE_ICCCM_WMREPLACE" \
 		-D"sysconfdir=$(sysconfdir)" --replace "sysconfdir" \
 		-D"pkgdatadir=$(pkgdatadir)" --replace "pkgdatadir" \
 		-o "wmaker.1x"  "$(srcdir)/wmaker.in"

doc/wmaker.in

@@ -51,6 +51,9 @@ disable the Drawers in the Dock
 @!HAVE_INOTIFY@.TP
 @!HAVE_INOTIFY@.B \-\-no\-polling
 @!HAVE_INOTIFY@disable the periodic check on the configuration file to reload it automatically
+@USE_ICCCM_WMREPLACE@.TP
+@USE_ICCCM_WMREPLACE@.B \-\-replace
+@USE_ICCCM_WMREPLACE@ask the currently running window manager to let Window Maker take his place
 .TP
 .B \-\-static
 do not update or save automatically the configuration