RFR: 8282395: URL.openConnection can throw IOOBE [v2]

[KIRIYAMA Takuya]

> I fixed sun.net.www.ParseUtil.decode().
> 
> ParseUtil.decode() always tries to decode after parsing '%', so if '%' is located at the end of the String, IndexOutOfBoundsException is thrown. Also, if '%' is shown after decodable string and following string is not decodable (e.g: "%25%s%G1"), ParseUtil.decode() throws IllegalArgumentException.
> 
> But URL standard says below (https://url.spec.whatwg.org/#percent-decode).
> 
> 
> Otherwise, if byte is 0x25 (%) and the next two bytes after byte in input are not in the ranges 
> 0x30 (0) to 0x39 (9), 0x41 (A) to 0x46 (F), and 0x61 (a) to 0x66 (f), all inclusive, append byte to output.
> 
> 
> So, there should be used isEscaped() to judge to decode.
> 
> Would you please review this fix?

KIRIYAMA Takuya has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - #8282395 URL.openConnection can throw IOOBE
 - Merge branch 'master' into 8282395
 - 8282395: URL.openConnection can throw IOOBE

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8155/files
  - new: https://git.openjdk.java.net/jdk/pull/8155/files/dd9d0423..28849591

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8155&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8155&range=00-01

  Stats: 495165 lines in 6162 files changed: 332406 ins; 99088 del; 63671 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8155.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8155/head:pull/8155

PR: https://git.openjdk.java.net/jdk/pull/8155