RFR: 8272758: Improve HttpServer to avoid partial file name matches while mapping request path to context path [v5]

[Volkan Yazici]

> Currently `HttpServer` allows matching a request path `/foobar` to context path `/foo`. Replace this surprising behaviour with a safer approach by requiring exact *path prefix matches*.
> 
> 
>          |           Request path
>  Context +------+-------+----------+---------
>   path   | /foo | /foo/ | /foo/bar | /foobar
> ---------+------+-------+----------+---------
>  /       |   Y  |   Y   |     Y    |    Y
>  /foo/   |   N  |   Y   |     Y    |    N

Volkan Yazici has updated the pull request incrementally with one additional commit since the last revision:

  State that the property is temporary

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/29264/files
  - new: https://git.openjdk.org/jdk/pull/29264/files/03cab635..24fca745

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=29264&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29264&range=03-04

  Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/29264.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29264/head:pull/29264

PR: https://git.openjdk.org/jdk/pull/29264