Some Log issues

For the "A Custom Appender Example": The calls

Cout.append(layout.header);
Cout.append(layout.content);
Cout.append(layout.footer);

must be changed to

Cout.append(layout.header(event));
Cout.append(layout.content(event));
Cout.append(layout.footer(event));

for the example to work. Actually, this is annoying, but no major bug. I was not sure if it was OK to change myself?

Also, the subsection about Layout refers to "tango.util.log.Layout" which does not exist. Nothing serious.