0.22

• Improved retries for Call Caching and general bug fixes.
• Users will experience better scalability of status polling for Google JES.
• Now there are configurable caching strategies for a SharedFileSystem backend (i.e. Local, SFS) in the backend's stanza:
  See below for detailed descriptions of each configurable key.

backend {
  ...
  providers {
    SFS_BackendName {
      actor-factory = ...
      config {
        ...
        filesystems {
          local {
            localization: [
               ...
            ]
            caching {
              duplication-strategy: [
                "hard-link", "soft-link", "copy"
              ]
              # Possible values: file, path
              # "file" will compute an md5 hash of the file content.
              # "path" will compute an md5 hash of the file path. This strategy will only be effective if the duplication-strategy (above) is set to "soft-link",
              # in order to allow for the original file path to be hashed.
              hashing-strategy: "file"

              # When true, will check if a sibling file with the same name and the .md5 extension exists, and if it does, use the content of this file as a hash.
              # If false or the md5 does not exist, will proceed with the above-defined hashing strategy.
              check-sibling-md5: false
            }

• Multiple Input JSON files can now be submitted in server mode through the existing submission endpoint: /api/workflows/:version.
  This endpoint accepts a POST request with a multipart/form-data encoded body. You can now include multiple keys for workflow inputs.

  Each key below can contain an optional JSON file of the workflow inputs. A skeleton file can be generated from wdltool using the "inputs" subcommand.
  NOTE: In case of key conflicts between multiple JSON files, higher values of x in workflowInputs_x override lower values. For example, an input
  specified in workflowInputs_3 will override an input with the same name that was given in workflowInputs or workflowInputs_2. Similarly, an input
  specified in workflowInputs_5 will override an input with the same name in any other input file.
  
  workflowInputs
  workflowInputs_2
  workflowInputs_3
  workflowInputs_4
  workflowInputs_5
  

• You can now limit the number of concurrent jobs for a backend by specifying the following option in the backend's config stanza:

backend {
  ...
  providers {
    BackendName {
      actor-factory = ...
      config {
        concurrent-job-limit = 5