RFR: Links and lists

[Jesper Wilhelmsson]

Stylistic changes in lists.
Fixed some links.
Clarified wording in JBS label dictionary and added a label.

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Commit messages:
 - Links and tables

Changes: https://git.openjdk.java.net/guide/pull/81/files
 Webrev: https://webrevs.openjdk.java.net/?repo=guide&pr=81&range=00
  Stats: 46 lines in 2 files changed: 29 ins; 0 del; 17 mod
  Patch: https://git.openjdk.java.net/guide/pull/81.diff
  Fetch: git fetch https://git.openjdk.java.net/guide pull/81/head:pull/81

PR: https://git.openjdk.java.net/guide/pull/81