[augeas-devel] aug_srun: new API call to execute several commands (v2)

[lutter at redhat.com]

This is the second version of the patch(es) to add an aug_srun call to the
API. Unless I hear any objections, I will commit these on Monday and make a
release with them.

One nice side effect of adding aug_srun is that it's now much easier to
test the API, and augtool, for proper behavior, and especially error
reporting. See tests/run.tests for what is being tested there.

David