doc: Fix date in EPUB manifest

If there is no  element, the publication date for the EPUB
manifest is taken from the copyright year.  But something like
"1996-2013" is not a legal date specification.  So the EPUB output
currently fails epubcheck.

Put in a separate  element with the current year.  Put it in
legal.sgml, because copyright.pl already instructs to update that
manually, so it hopefully won't be missed.

diff --git a/doc/src/sgml/legal.sgml b/doc/src/sgml/legal.sgml
index 1c40ec47ee304765c8b43f0bfad212ce7579420c..0562eb570303487e0630588ef672e314e813895d 100644 (file)
--- a/doc/src/sgml/legal.sgml
+++ b/doc/src/sgml/legal.sgml
@@ -1,5 +1,7 @@
 
 
+2013
+
 
  1996-2013
  The PostgreSQL Global Development Group