RFR: 8314261: Make fields final in sun.net.www [v5]

[Andrey Turbanov]

> A few classes in `sun.net.www` package have non-final fields which could easily be marked `final`.

Andrey Turbanov has updated the pull request incrementally with one additional commit since the last revision:

  8314261: Make fields final in sun.net.www
  
  rename preferedHeaderSize

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/14977/files
  - new: https://git.openjdk.org/jdk/pull/14977/files/b0ad815a..772a42ab

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14977&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14977&range=03-04

  Stats: 5 lines in 1 file changed: 0 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/14977.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14977/head:pull/14977

PR: https://git.openjdk.org/jdk/pull/14977