RFR: 263: Add target repo and branch to subject of RFR email

[Robin Westberg]

Hi all,

Please review this change that optionally adds the name of the target repo and/or branch to the subject line of an RFR email.

Best regards,
Robin

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Commits:
 - 6bef52f4: Merge remote-tracking branch 'upstream/master' into branch_prefix
 - 2456ad1f: Add support for optional repo and branch prefix on generated RFR emails

Changes: https://git.openjdk.java.net/skara/pull/431/files
 Webrev: https://webrevs.openjdk.java.net/skara/431/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-263
  Stats: 265 lines in 7 files changed: 228 ins; 0 del; 37 mod
  Patch: https://git.openjdk.java.net/skara/pull/431.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/431/head:pull/431

PR: https://git.openjdk.java.net/skara/pull/431