more sensible default text in pot files

Git-Dch: Ignore

doc/po/apt-doc.pot

@@ -1,5 +1,4 @@
-# SOME DESCRIPTIVE TITLE
-# Copyright (C) YEAR Free Software Foundation, Inc.
+# Translation of apt manpages and documentation to LANGUAGE
 # This file is distributed under the same license as the apt-doc package.
 # FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
 #

po/apt-all.pot

@@ -1,5 +1,5 @@
-# SOME DESCRIPTIVE TITLE.
-# This file is put in the public domain.
+# Translation of apt programs to LANGUAGE
+# This file is distributed under the same license as the apt package.
 # FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
 #
 #, fuzzy