+ get rid of -a argument, which was superfluous since no arguments
means provide information on everything known
+ add the shell function to check for the path of a program. Taken
from pkgsrc bootstrap script, modified for return values, and "not
found" action
+ use this shell function for tcsh and unbound, both of which may not
exist on systems
+ go back to using standard shell construct for parsing options now,
since there is only 1 option with no optargs
+ from a suggestion from Paul Goyette, run the provided arguments
through sort | uniq
+ add sys_info itself to the list of programs to report
8df5d7616d