Change in config-dist.php to 'SETTINGS FOR DEVELOPMENT SERVERS' to include reference to DEBUGGING

Although I can see the thinking behind this I feel this is an unfortunate change (which I have only just noticed). A big use of this section is enabling debugging on broken sites - production sites even. I'd really like to see 'DEBUGGING' back in the title. In the support forums we are often telling users to go and find the 'debugging' section in config-dist.php. It's also made tons of stuff obsolete in the documentation.