Dialog:

    'dialogselect',  index



Build:

    'setstringmap'  comma separated list of 'string=value' mappings for substitutions while loading XML files
    'setconfig',    config template URL
    'setenv',       env template URL
    'setmode',      mode: idle, slave, master, test
    'start'         (none)
    'abort'         (none)                                  # aborts all current operations

    'nextpass'      (none)
    'restarttask'   task id: "machine.nID"



Events fired into web page:

    'debugout',   output string
    'update',     depot name which changed, or null for all or unknown.
    'dialog',     none