[Rev 01] RFR: jcheck: duplicate-issues should only check id and support "dup"

[Erik Helin]

> Hi all,
> 
> please review this patch that makes the "duplicate-issues" check in JCheck
> _only_ consider issue ids (e.g. `8123456`) when looking for duplicates. I also
> added support for the "legacy" .jcheck/conf parser to understands the `bugids =
> dup` configuration line.
> 
> Testing:
> - Manual testing on Linux x64
> 
> Thanks,
> Erik

Erik Helin has updated the pull request incrementally with one additional commit since the last revision:

  Add test

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

Changes:
  - all: https://git.openjdk.java.net/skara/pull/533/files
  - new: https://git.openjdk.java.net/skara/pull/533/files/78d33b98..8986da78

Webrevs:
 - full: https://webrevs.openjdk.java.net/skara/533/webrev.01
 - incr: https://webrevs.openjdk.java.net/skara/533/webrev.00-01

  Stats: 145 lines in 2 files changed: 144 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/skara/pull/533.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/533/head:pull/533

PR: https://git.openjdk.java.net/skara/pull/533