This supersedes the previous Fails: section, into a more general set of
lines of form:

      <testname> <option>...

With the special <option> "FAIL" to mean we know we fail this test.
We accept options to valgrind-tests; in particular tdb2 wants
--partial-loads-ok=yes passed to valgrind.

I wanted to see what happened with tdb2's valgrind test (suppressed in the
_info file).

This allows tests (like in tdb2) to run the simpler tests first and build up,
making it easier to spot the root cause of errors.

ccanlint complained about it; it's trivial but fixing it adds one point to 
our score.

ccanlint did this automatically.

Also, add Author and License lines to _info (ccanlint complained).
Now ccanlint can build it as a module.

This makes it closer to compiling under ccanlint.

This means we can pass various compulation tests, but deduct points if
they get warnings.

We want to distinguish between warnings and errors: the first step is to
return the output even if the command doesn't fail.

Test for inserting idempotent header was wrong way around, and we check
all headers at once, rather than finishing after one.

Also, turn - into _ rather than removing.

This means we can see messages even if we don't fail; ie. for compiler warnings
once they are no longer fatal.

This means that various tests have to be more careful in not setting
score->error.

We only grabbed one character at a time from stdin, so "y<return>" answered
the next question as well.

Michael Ellerman noted that ccan/opt has no symlink, so add ccanlint test.

I am told that CentOS 5.3 doesn't like isblank (it's ISO C).

Delio Brignoli points out that check_type fails when HAVE_TYPEOF is 0,
so turn that off here and see what else breaks...

"C has fairly weak typing:" from check_type/_info is not a new section heading!
Enforce that each word in multi-word sections must be caps.

We used to prefer to build up examples using previous ones, but this broke
for tests which were to be executed.  But list.h relied on the buildup
behavior, so return to that unless we see "// Given" comments indicating
an execution test.

gcc with optimization complained (correctly) about this.

(nfs gives warnings on build, make ccanlint unhappy).

The long names were unwieldy in practice; at risk of clashing, replace
with shorter versions.

ccanlint won't run rpcgen, so we need the C source in the repo anyway.

rename libnfs.h to nfs.h (CCAN expects "main" header to match module name).
tools move into tools/, .x file move into rpc/
Don't sed the rpcgen files, generate headers in rpc/
Make tools use <ccan/nfs/nfs.h> as per normal ccan usage.

Another Ronnie module!

Previously each check returned a void *, but in fact most of them fell into
similar patterns.  So define 'struct score' and a helper to add files to it,
and use that.

Under these rules, you get 0/1 if you skip a test because a dependency failed
which in theory means your score (as a percentage) could drop if you fix
a test.

Make test directory correctly, and #include <ccan/...> not #include "".