inets: Small fixes for httpd documentation

[jchristgit]

This PR:

• reformats all configuration properties into codeblocks
• uses proper headings for all categories of settings
• fixes indentation of the record data information

and removes the ets_table type in favour of ets:tid itself, as it was only used once.

[github-actions[bot]]

CT Test Results

  2 files   22 suites   10m 33s :stopwatch: 349 tests 344 :white_check_mark:  5 :zzz: 0 :x: 619 runs  568 :white_check_mark: 51 :zzz: 0 :x:

Results for commit 201d2243.

:recycle: This comment has been updated with latest results.

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Artifacts

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• Windows Installer

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