[Rev 01] RFR: Allow unsafe features when importing

[Robin Westberg]

> Hi all,
> 
> Please review this change that adds a new required flag for running git fast-import, required after the latest git security fixes.
> 
> Best regards,
> Robin

The pull request has been updated with 1 additional commit.

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

Added commits:
 - a270d596: Update dockerfiles

Changes:
  - all: https://git.openjdk.java.net/skara/pull/347/files
  - new: https://git.openjdk.java.net/skara/pull/347/files/4fa9a39a..a270d596

Webrevs:
 - full: https://webrevs.openjdk.java.net/skara/347/webrev.01
 - incr: https://webrevs.openjdk.java.net/skara/347/webrev.00-01

  Stats: 4 lines in 2 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/skara/pull/347.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/347/head:pull/347

PR: https://git.openjdk.java.net/skara/pull/347