* Router Console translation infrastructure:

- Persistent lang setting with routerconsole.lang=xx
      - Loading any page with ?lang=xx changes the persistent setting
      - Add a custom Jetty handler to load foo_xx.jsp if it
        exists for language xx. This is for jsp files with lots
        of text in them. Otherwise use inline translate methods.
        Not for included jsps.
      - Add a script to create and update messages_xx.po translation
        files, and create ResourceBundles from them
      - Add class to translate strings from cached ResourceBundles
      - Add translate wrappers to HelperBase, FormHandler, and *Renderer,
        so calls can be made from both jsp and java files
      - Add two example translations on configupdate.jsp - one in
        the jsp itself and one in the helper.
      - This is for strings in routerconsole only. Will be expanded
        to other webapps and the router later.

apps/routerconsole/java/bundle-messages.sh

@@ -0,0 +1,51 @@
+#
+# Update messages_xx.po and messages_xx.class files,
+# from both java and jsp sources.
+# Requires installed programs xgettext, msgfmt, and find.
+# zzz - public domain
+#
+CLASS=net.i2p.router.web.messages
+TMPFILE=build/javafiles.txt
+
+for i in ../locale/messages_*.po
+do
+	# get language
+	LG=${i#../locale/messages_}
+	LG=${LG%.po}
+
+	# make list of java files newer than the .po file
+	find src ../jsp/WEB-INF -name *.java -newer $i > $TMPFILE
+	if [ -s build/obj/net/i2p/router/web/messages_$LG.class -a ! -s $TMPFILE ]
+	then
+		continue
+	fi
+
+	echo "Generating ${CLASS}_$LG ResourceBundle..."
+
+	# extract strings from java and jsp files, and update messages.po files
+	# translate calls must be one of the forms:
+	# _("foo")
+	# cssHelper._("foo")
+	# handler._("foo")
+	# formhandler._("foo")
+	# In a jsp, you must use a helper or handler that has the context set.
+	# To start a new translation, copy the header from an old translation to the new .po file,
+	# then ant distclean updater.
+	xgettext -f build/javafiles.txt -F -L java --keyword=_ --keyword=cssHelper._ --keyword=handler._ --keyword=formhandler._ -o $i -j
+	if [ $? -ne 0 ]
+	then
+		echo 'Warning - xgettext failed, not updating translations'
+		break
+	fi
+
+	# convert to class files in build/obj
+	msgfmt --java -r $CLASS -l $LG -d build/obj $i
+	if [ $? -ne 0 ]
+	then
+		echo 'Warning - xgettext failed, not updating translations'
+		break
+	fi
+done
+rm -f $TMPFILE
+# todo: return failure
+exit 0