[svn-r20985] Changed the release date format to yyyy-mm-dd from the previous date form.

Tested: Jam by running bin/release and eyeballed the new date format.

bin/release

@@ -97,6 +97,7 @@ VERS_OLD=
 test "$VERS" || exit 1
 verbose=yes
 check=yes
+release_date=`date +%F`
 today=`date +%Y%m%d`
 pmode='no'
 tmpdir="../#release_tmp.$$"	# tmp work directory
@@ -211,7 +212,7 @@ cp -p Makefile.dist Makefile
 # Update README.txt and release_docs/RELEASE.txt with release information in
 # line 1.
 for f in README.txt release_docs/RELEASE.txt; do
-    echo "HDF5 version $VERS released on `date`" >$f.x
+    echo "HDF5 version $VERS released on $release_date" >$f.x
     sed -e 1d $f >>$f.x
     mv $f.x $f
     # Make sure new files are of the right access mode