RFR: Mailing list filter rule generator / verifier [v3]

[Robin Westberg]

> Hi all,
> 
> Please review this change that introduces the "mlrules" command, which can be used to generate and verify mailing list
> filter rules for the jdk/jdk family of development mailing lists. These filter rules can be used by the Skara bots when
> figuring out on which list(s) a jdk pull request should be reviewed.  The idea is that this command can be used by
> knowledgeable OpenJDK developers to help improve the quality of the filter rules that will eventually end up being used
> when the jdk repository starts using pull requests. Examples of usage, together with an initial version of these filter
> rules, will be posted separately.  Best regards, Robin

Robin Westberg has updated the pull request incrementally with one additional commit since the last revision:

  Fix test running problem

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

Changes:
  - all: https://git.openjdk.java.net/skara/pull/733/files
  - new: https://git.openjdk.java.net/skara/pull/733/files/01a83643..ef12979f

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=skara&pr=733&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=skara&pr=733&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/skara/pull/733.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/733/head:pull/733

PR: https://git.openjdk.java.net/skara/pull/733