gettext build rules tweaks

* Add --qt to xgettext options so that %1, %2 etc are recognised in format strings
  (as used by Glib::ustring::format)
* Remove references to non-existent sed script from darkradiant.pot-update
  rules.

install/i18n/Makefile.in.in

@@ -66,7 +66,7 @@ POFILES = @POFILES@
 GMOFILES = @GMOFILES@
 UPDATEPOFILES = @UPDATEPOFILES@
 DUMMYPOFILES = @DUMMYPOFILES@
-DISTFILES.common = Makefile.in.in remove-potcdate.sin \
+DISTFILES.common = Makefile.in.in \
 $(DISTFILES.common.extra1) $(DISTFILES.common.extra2) $(DISTFILES.common.extra3)
 DISTFILES = $(DISTFILES.common) Makevars POTFILES.in \
 $(POFILES) $(GMOFILES) \
@@ -137,7 +137,7 @@ stamp-po: $(srcdir)/$(DOMAIN).pot
 
 # This target rebuilds $(DOMAIN).pot; it is an expensive operation.
 # Note that $(DOMAIN).pot is not touched if it doesn't need to be changed.
-$(DOMAIN).pot-update: $(POTFILES) $(srcdir)/POTFILES.in remove-potcdate.sed
+$(DOMAIN).pot-update: $(POTFILES) $(srcdir)/POTFILES.in
 	if LC_ALL=C grep 'GNU @PACKAGE@' $(top_srcdir)/* 2>/dev/null | grep -v 'libtool:' >/dev/null; then \
 	  package_gnu='GNU '; \
 	else \
@@ -168,8 +168,8 @@ $(DOMAIN).pot-update: $(POTFILES) $(srcdir)/POTFILES.in remove-potcdate.sed
 	esac
 	test ! -f $(DOMAIN).po || { \
 	  if test -f $(srcdir)/$(DOMAIN).pot; then \
-	    sed -f remove-potcdate.sed < $(srcdir)/$(DOMAIN).pot > $(DOMAIN).1po && \
-	    sed -f remove-potcdate.sed < $(DOMAIN).po > $(DOMAIN).2po && \
+	    cat < $(srcdir)/$(DOMAIN).pot > $(DOMAIN).1po && \
+	    cat < $(DOMAIN).po > $(DOMAIN).2po && \
 	    if cmp $(DOMAIN).1po $(DOMAIN).2po >/dev/null 2>&1; then \
 	      rm -f $(DOMAIN).1po $(DOMAIN).2po $(DOMAIN).po; \
 	    else \
@@ -335,7 +335,6 @@ check: all
 info dvi ps pdf html tags TAGS ctags CTAGS ID:
 
 mostlyclean:
-	rm -f remove-potcdate.sed
 	rm -f stamp-poT
 	rm -f core core.* $(DOMAIN).po $(DOMAIN).1po $(DOMAIN).2po *.new.po
 	rm -fr *.o

install/i18n/Makevars

@@ -8,7 +8,7 @@ subdir = install/i18n
 top_builddir = ../..
 
 # These options get passed to xgettext.
-XGETTEXT_OPTIONS = --keyword=_ --keyword=N_
+XGETTEXT_OPTIONS = --keyword=_ --keyword=N_ --qt
 
 # This is the copyright holder that gets inserted into the header of the
 # $(DOMAIN).pot file.  Set this to the copyright holder of the surrounding