README: Mention that man pages can be translated.

README

@@ -9,7 +9,7 @@
        1.3. Documentation for liblzma
     2. Version numbering
     3. Reporting bugs
-    4. Translating the xz tool
+    4. Translations
     5. Other implementations of the .xz format
     6. Contact information
 
@@ -192,6 +192,6 @@
     system.
 
 
-4. Translating the xz tool
---------------------------
+4. Translations
+---------------
 
@@ -197,4 +197,5 @@
 
+    The xz command line tool and all man pages can be translated.
     The translations are handled via the Translation Project. If you
     wish to help translating xz, please join the Translation Project: