noc: Clean up conf viewer

- Remove exception for langlist and wikiversions.dat from regular
  txt protocol. At least in Google Chrome accessing
  conf/wikiversions.dat causes a download instead of a view.
- Re-run createTxtFileSymlinks.sh to fix symlinks paths
- Find path to /h/w/c relatively instead of absolutely so that
  it also works when testing locally.
- Add context to highlight.php <title> tag
- Add favicon to conf/*.php
- Add the remainder files from public wmf-config/*.php that
  weren't in the list yet.

Change-Id: I2d8a2a0ca8da54c9a22cfe45e98a062c425d22d3