Introduce a 'NICE_HEADERS' tuneable knob that creates customized
chapter headers that you may find more aesthetically pleasing than the
rather spartan chapter headers in Norm's print stylesheets. This
option only effects print output formats for English language books.

Also move the local-en-label-title-sep customization from share/sgml
to en_blah/share/sgml since the best values for this customization
depend on the locale.

This changes (make FORMATS=ps) :

Chapter 7. Users and Basic Account Management

7.1. Synopsis

into (make NICE_HEADERS=1 FORMATS=ps) :

Chapter 7
/Users and Basic Account Management/

7.1  Synopsis

More work needs to be done for the NICE_HEADERS case to enhance the
output, but I think its an improvement.