* Merge from Debian unstable.  Remaining changes:
  - Add support for arm64:
    + d/control: Add arm64 to list of target architectures.
    + d/p/0001-Add-option-to-disable-javascript.patch,
      d/p/0001-SERVER-12064-Atomic-operations-for-gcc-non-Intel-arc.patch,
      d/p/0002-SERVER-12065-Support-ARM-and-AArch64-builds.patch:
      Patches to support arm64.
    + d/p/0005-ARM-support-for-ASM-operations-in-MongoDB.patch: Dropped in
      preference to above patches.
    + d/rules: Disable scripting on arm64.
  - d/p/0004-Support-ppc64el-builds.patch: Rebase on arm64 patches.
* d/mongodb-server.postinst: Call adduser with explicit --home.