Except for src/ext, which we may not want to modify.

Closes ticket 32732.

We added this facility so that we could get deterministic PRNG
behavior for coverage testing on tests that use a replaced PRNG.
We need to have our coverage determinism tool test for this as well.

Closes ticket 29436.

It was looking for object files made with the old automake
directorations, but those changed when we split up our libraries.

Fixes bug 29435; bugfix on 0.3.5.1-alpha.

Closes 29099.

We can safely silence SC2086 warning on $CHECKERS, as contents of that
is hardcoded into script, and we don't want to require Bash to use Bash
array here. Double-quote $OUTPUTARG, as it's value depends on environment
variable.

Supports bisection on 0.3.4 and earlier.
Recommend that users copy the script before bisecting.

Implements ticket 27211.

Part of 26979.

To avoid future duplicates.

Part of 26979.

Part of 26979.

Part of 26979.

That's what git does for tor.

Part of 26979.

Part of 26979.

Part of 26979.

To avoid future duplicates.

Part of 26979.

Part of 26979.

Part of 26979.

That's what git does for tor.

Part of 26979.

Part of 26979.

Original by Christopher Wood, with modifications by nexB, Isis
Lovecruft, and Marcin Cieślak.

The new gcov sometimes emits *s if there is a line containing
multiple basic blocks, and some are not executed.  (The gcov
documentation says something weird about this point, so I'm trying
to interpret it into the compilerese that I'm familiar with.)
That's bug 26101.

Also, when we're looking for unique variations in our coverage, we
would like cov-diff to suppress timestamps on the diffs.  That's bug
26102.

Both of these are bugfixes on 0.2.5.1-alpha when the cov-diff script
was introduced.

My apologies for the perl.

In scripts/test/coverage, avoid attempting to move gcov output files
to the root directory when given no arguments.  Fixes bug 23741.