cdc017bcb0
options on the command line now define *defaults* that host files can override (for instance -j, stuck, -p, -J). Add -p /n to mean "take number of jobs, if >1, divide by n, round up to 2, and use that for parallel. Document -p. Make junk be 'by host' (and it's a prop, so you can tweak it). concurrent log that records how many jobs are running each time it changes. tag parallel builds *n in the time record.