Fixing numerous issues with tests and "make dist":

Fixing numerous issues with tests and "make dist":

* test/regress/regress0/unconstrained wasn't being distributed.  This caused the debian build failure last night.  (It still doesn't run on "make check", but had to be distributed properly.)
* Fixing an issue where a test name was longer than 99 characters and couldn't be distributed in the "old" tar format.  (Told automake to use a newer tar format.)