[crac] RFR: Handle open file descriptors with configurable policies [v4]

[Radim Vansa]

> When the application does not close some file descriptors through Resources we can use `jdk.crac.fd-policy.checkpoint` and `jdk.crac.fd-policy.restore` to configure the behaviour.
> 
> These properties can specify a list of File.pathSeparator-separated key=value pairs, where the key can be one of:
> 
> * numeric file descriptor
> * path using 'glob' pattern matching (see FileSystem.getPathMatcher() for details)
> * keywords FIFO and SOCKET that match pipes and sockets
> 
> The value should match one of possible values from OpenFDPolicies.BeforeCheckpoint and OpenFDPolicies.AfterRestore

Radim Vansa has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains seven commits:

 - Refactor FileDescriptor resource to separate class
 - Add REOPEN_AT_END and OPEN_OTHER_AT_END policies
 - Merge branch 'crac' into newfd-policies
 - Effectively revert previous commit: Initialize logger in <clinit>
 - Simplify workarounds in SimpleConsoleLogger.<clinit>
 - Merge branch 'crac' into newfd-policies
 - Handle open file descriptors with configurable policies
   
   When the application does not close some file descriptors through
   Resources we can use `jdk.crac.fd-policy.checkpoint` and
   `jdk.crac.fd-policy.restore` to configure the behaviour.
   
   These properties can specify a list of File.pathSeparator-separated
   key=value pairs, where the key can be one of:
   
   * numeric file descriptor
   * path using 'glob' pattern matching (see FileSystem.getPathMatcher()
     for details)
   * keywords FIFO and SOCKET that match pipes and sockets
   
   The value should match one of possible values from
   OpenFDPolicies.BeforeCheckpoint and OpenFDPolicies.AfterRestore

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

Changes: https://git.openjdk.org/crac/pull/69/files
 Webrev: https://webrevs.openjdk.org/?repo=crac&pr=69&range=03
  Stats: 1296 lines in 16 files changed: 1221 ins; 69 del; 6 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