Megatest

Queries
  -list-runs patt         : list runs matching pattern \"patt\", % is the wildcard
  -showkeys               : show the keys used in this megatest setup
  -test-files targpatt     : get the most recent test path/file matching targpatt e.g. %/%... 
                            returns list sorted by age ascending, see examples below
  -test-paths             : get the test paths matching target, runname, item and test
                            patterns.
  -list-disks             : list the disks available for storing runs
  -list-targets           : list the targets in runconfigs.config
  -list-db-targets        : list the target combinations used in the db

Misc 
  -rebuild-db             : bring the database schema up to date
  -update-meta            : update the tests metadata for all tests
  -env2file fname         : write the environment to fname.csh and fname.sh
  -setvars VAR1=val1,VAR2=val2 : Add environment variables to a run NB// these are
                                 overwritten by values set in config files.

	    (else    (sqlite3:execute mdb "UPDATE servers SET state='dead' WHERE hostname=? AND port=?;" hostname port)))
	  (debug:print 0 "ERROR: tasks:server-deregister called with neither pid nor port specified"))))

(define (tasks:server-deregister-self mdb hostname)
  (tasks:server-deregister mdb hostname pid: (current-process-id)))

(define (tasks:server-get-server-id mdb hostname iface port pid)
  (debug:print-info 12 "tasks:server-get-server-id " mdb " " hostname " " iface " " port " " pid)
  (let ((res #f))
    (sqlite3:for-each-row
     (lambda (id)
       (set! res id))
     mdb
     (cond
      ((and hostname  pid)  "SELECT id FROM servers WHERE hostname=?  AND pid=?;")