RFR: 8253100: Fix "no comment" warnings in java.base/java.net [v4]

[Daniel Fuchs]

> Hi, 
> 
> Please find here a change that fixes "no comment" warnings generated by `javadoc -Xdoclint` for `java.base/java.net`

Daniel Fuchs has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains six additional commits since the last revision:

 - Merge branch 'master' into serial-warnings-8253100
 - Fixed formatting (newlines)
 - Fixed @throws to conform to the style of other @throws in java.net.URI
 - Fixed comment
 - Fixed trailing whitespace
 - 8253100: Fix "no comment" warnings in java.base/java.net

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/2715/files
  - new: https://git.openjdk.java.net/jdk/pull/2715/files/ea605ca6..f90fd10c

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=2715&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=2715&range=02-03

  Stats: 23739 lines in 835 files changed: 15203 ins; 4475 del; 4061 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2715.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2715/head:pull/2715

PR: https://git.openjdk.java.net/jdk/pull/2715