Include auth browse docs in OPAC section

Also fix a typo in the section title.

Signed-off-by: Dan Scott <dscott@laurentian.ca>
Clean up minor doc problems

"Content Café" would generate a section ID containing "é" which is not
well-formed XML; that was breaking PDF generation. Provide an explicit
ID for the section in question.

The OPAC advanced features section skipped a level of headings, which
generated a warning during PDF processing.

Signed-off-by: Dan Scott <dscott@laurentian.ca>
Fix doc typo in public interface setup section

Signed-off-by: Dan Scott <dscott@laurentian.ca>