RFR: 8253470: Javadoc clean up in Filter and Headers [v2]

[Patrick Concannon]

> Hi,
> 
> Could someone please review my doc-only fix for JDK-8253470 - 'Javadoc clean up in Filter and Headers' ?
> 
> This fix is set of formatting changes intended to clean up the javadoc of the following classes :
> 
> `com.sun.net.httpserver.Filter`
> `com.sun.net.httpserver.Filter.Chain`
> `com.sun.net.httpserver.Headers`
> 
> This issue is a sub-task of [JDK-8252822](https://bugs.openjdk.java.net/browse/JDK-8252822)
> 
> Kind regards,
> Patrick

Patrick Concannon has updated the pull request with a new target base due to a merge or a rebase. The pull request now
contains one commit:

  8253470: Javadoc clean up in Filter and Headers

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

Changes: https://git.openjdk.java.net/jdk/pull/429/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=429&range=01
  Stats: 113 lines in 2 files changed: 40 ins; 16 del; 57 mod
  Patch: https://git.openjdk.java.net/jdk/pull/429.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/429/head:pull/429

PR: https://git.openjdk.java.net/jdk/pull/429