[crac] RFR: Handle open file descriptors with configurable policies [v16]

[Radim Vansa]

> When the application does not close some file descriptors through Resources we can use `jdk.crac.resource-policies` pointing to a configuration file that might adjust the behaviour. The file uses a simple YAML-conformant format with individual rules separated by a line with `---`:
> 
> 
> type: file
> path: /path/to/*.txt
> action: close
> ---
> type: socket
> localAddress: 127.0.0.1
> localPort: 8080
> action: ignore
> 
> 
> Available types:
> * `file`: supports `path` with 'glob' pattern matching (see FileSystem.getPathMatcher() for details)
> * `pipe`: anonymous pipes (named pipe is handled as `file`)
> * `socket`: can be refined using `family`, `localAddress`, `localPort`, `localPath` (in case of Unix sockets), `remoteAddress`, `remotePort` and `remotePath`
> 
> Actions depend on each resource, defaulting to `error`, with common options `close` and `ignore`. Files have `reopen` action, too.

Radim Vansa has updated the pull request incrementally with one additional commit since the last revision:

  Print warning suppression hint only once

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

Changes:
  - all: https://git.openjdk.org/crac/pull/69/files
  - new: https://git.openjdk.org/crac/pull/69/files/a170ab56..578c965c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=crac&pr=69&range=15
 - incr: https://webrevs.openjdk.org/?repo=crac&pr=69&range=14-15

  Stats: 9 lines in 1 file changed: 5 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/crac/pull/69.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/69/head:pull/69

PR: https://git.openjdk.org/crac/pull/69