RFR: 8253473: Javadoc clean up in HttpHandler, HttpPrincipal, HttpContext, and HttpsConfigurator

[Patrick Concannon]

Hi,

Could someone please review my doc-only fix for JDK-8253473: 'Javadoc clean up in HttpHandler, HttpPrincipal, HttpContext, and HttpsConfigurator ' ?

This fix is set of formatting changes intended to clean up the javadoc of the following classes :

`com.sun.net.httpserver.HttpHandler`
`com.sun.net.httpserver.HttpPrincipal`
`com.sun.net.httpserver.HttpContext`
`com.sun.net.httpserver.HttpsConfigurator` 

This issue is a sub-task of [JDK-8252822](https://bugs.openjdk.java.net/browse/JDK-8252822)

Kind regards,
Patrick

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Commit messages:
 - 8253473: Javadoc clean up in HttpHandler, HttpPrincipal, HttpContext, and HttpsConfigurator

Changes: https://git.openjdk.java.net/jdk/pull/810/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=810&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8253473
  Stats: 127 lines in 4 files changed: 26 ins; 8 del; 93 mod
  Patch: https://git.openjdk.java.net/jdk/pull/810.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/810/head:pull/810

PR: https://git.openjdk.java.net/jdk/pull/810