RFR: Added section on maintainer-pain [v4]

[Jesper Wilhelmsson]

> Added section on maintainer-pain

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

  Moved description to JBS Label Dictionary

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Changes:
  - all: https://git.openjdk.java.net/guide/pull/37/files
  - new: https://git.openjdk.java.net/guide/pull/37/files/15c22582..74f197ca

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=guide&pr=37&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=guide&pr=37&range=02-03

  Stats: 43 lines in 1 file changed: 14 ins; 28 del; 1 mod
  Patch: https://git.openjdk.java.net/guide/pull/37.diff
  Fetch: git fetch https://git.openjdk.java.net/guide pull/37/head:pull/37

PR: https://git.openjdk.java.net/guide/pull/37