Bug fix.
Description:
When it reads the allhostfile, it does eliminate comments or blank lines
completely, thus it continues to use ssh/rsh even when only the local
host is tested.
Solution:
Changed the sed scripts to eliminate comments and blank lines.
Tested:
Cobalt by running bin/runtest. Since this is not really library source,
the three platforms test does not apply.
5fe2a249cf