RFR: 8264948: Check for TLS extensions total length [v2]

[Xue-Lei Andrew Fan]

> To improve the readability, it would be nice to check the TLS extensions total length while parsing.
> 
> No new regression test,  trial update.

Xue-Lei Andrew Fan has updated the pull request incrementally with one additional commit since the last revision:

  Change to use decode_error for incorrect extension length

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3405/files
  - new: https://git.openjdk.java.net/jdk/pull/3405/files/5332d35d..1fa255c3

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3405&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3405&range=00-01

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3405.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3405/head:pull/3405

PR: https://git.openjdk.java.net/jdk/pull/3405