"    Update repository info

    Input:  {
              data_uoa                   - data UOA of the repo

              (shared)                   - if not remote and =='git', shared through GIT

              (url)                      - if type=='git', URL of remote repository or git repository
              (hostname)                 - if !='', automatically form url above (add http:// + /ck?)
              (port)                     - if !='', automatically add to url above
              (hostext)                  - if !='', add to the end of above URL instead of '/ck?' -
                                           useful when CK server is accessed via Apache2, IIS, Nginx or other web servers

              (sync)                     - if 'yes' and type=='git', sync repo after each write operation
              (allow_writing)            - if 'yes', allow writing 
                                           (useful when kernel is set to allow writing only to such repositories)

              (repo_deps)                - dict with dependencies on other shared repositories with following keys:
                                             "repo_uoa"
                                             ("repo_uid") - specific UID (version) of a repo
                                             ("repo_url") - URL of the shared repository (if not from github.com/ctuning)

              (update)                   - if 'yes', force updating

              (describe)                 - describe repository for Artifact Evaluation (see http://cTuning.org/ae)

              (private)                  - if 'yes', mark as private (do not automatically list entries, etc)

              (split_all_dirs)           - if !='0' force split of all dirs in this repo (be careful)
                                           must be empty before doing this!

              (recache)                  - if 'yes' force recache

              (quiet)                    - if 'yes', do not answer extra questions

              (dict)                     - update dict directly
            }

    Output: {
              return       - return code =  0, if successful
                                         >  0, if error
              (error)      - error text if return > 0
            }

"