RFR[8251496]: ‘Fix doclint warnings in jdk.net.httpserver’

[Patrick Concannon]

Hi,

Could someone please review my doc-only fix for JDK-8251496 - ‘Fix doclint warnings in jdk.net.httpserver’ ?

This fix addresses the warnings generated by `javadoc -Xdoclint` due to missing/incomplete API documentation for several classes within `jdk.net.httpserver`. 

issue: https://bugs.openjdk.java.net/browse/JDK-8251496
webrev:  http://cr.openjdk.java.net/~pconcannon/8251496/webrevs/webrev.00/
CSR: https://bugs.openjdk.java.net/browse/JDK-8252585 

Kind regards,
Patrick