Changes to pdq 2.2.1

1.  Modified util.c so that each user's files go into /tmp/username.pdq
    instead of into one common area if in printrc this line is used:
    
    job_dir "$"

2.  Fixed two bugs in in shepherd.c, at least on Solaris.  pdq would fail 
    if a user issued two fast "pdq foobar.ps" commands, or for
    "cat foobar | pdq".  It was some problem with pipes, execv,reaping,etc.
    Rather than figure that mess out I changed it to a simple system()
    to run the script and read the results back from a file.  That fixed
    both bugs.
    
To introduce these changes just drop the two files into the src directory
and "make" again.
    
Caveat emptor!

David Mathog
mathog@caltech.edu
Manager, Sequence Analysis Facility, Biology Division, Caltech
10-MAY-2002
