┌──────────────────┬───────────────────────────────┬─────────────────────────┐
│ buildd           │ sbuild                        │ unified                  │
├──────────────────┼───────────────────────────────┼─────────────────────────┤
│ WANNA_BUILD_DB   │ WANNABUILD_DATABASE           │ WANNA_BUILD_DB_NAME     │
│ WANNA_BUILD_USER │ AUTO_GIVEBACK_WANNABUILD_USER │ WANNA_BUILD_DB_USER     │
│ SSH_USER         │ AUTO_GIVEBACK_USER            │ WANNA_BUILD_SSH_USER    │
│ n/a              │ AUTO_GIVEBACK                 │ n/a                     │
│ SSH_HOST         │ AUTO_GIVEBACK_HOST            │ WANNA_BUILD_SSH_HOST    │
│ SSH_SOCKET       │ AUTO_GIVEBACK_SOCKET          │ WANNA_BUILD_SSH_SOCKET  │
│ SSH_OPTIONS      │ n/a                           │ WANNA_BUILD_SSH_OPTIONS │
└──────────────────┴───────────────────────────────┴─────────────────────────┘

buildd.conf:
  $wanna_build_db
  $wanna_build_user
  $ssh_user
  $ssh_host
  $ssh_socket
  @ssh_options

sbuild.conf:
  N/A (only specifiable on the command-line)

unified (to be used in both buildd.conf and sbuild.conf):
  $wanna_build_db_name
  $wanna_build_db_user
  $wanna_build_ssh_user
  $wanna_build_ssh_host
  $wanna_build_ssh_socket
  $wanna_build_ssh_options (as hashref)