RFR: Filing bug, ProblemListing, Backing out [v9]

[Jesper Wilhelmsson]

> Filing bug, ProblemListing, Backing out

Jesper Wilhelmsson has updated the pull request incrementally with one additional commit since the last revision:

  Comment about vulnerabilities, and jcheck on ProblemLists

-------------

Changes:
  - all: https://git.openjdk.java.net/guide/pull/21/files
  - new: https://git.openjdk.java.net/guide/pull/21/files/74bd7fd3..c66a78ab

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=guide&pr=21&range=08
 - incr: https://webrevs.openjdk.java.net/?repo=guide&pr=21&range=07-08

  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/guide/pull/21.diff
  Fetch: git fetch https://git.openjdk.java.net/guide pull/21/head:pull/21

PR: https://git.openjdk.java.net/guide/pull/21