* [presubmit] Enforce language attribute in projectt.yaml to be always set.
* Update documentation, better presubmit check, new project template.
* add docstring to templates.py
* Add example values in the project.yaml template and remove python value for now
* Add "project: c++" to 256 projects
* format
* Add labels and selective_unpack sections to the presubmit check
* fix incorrect auto_ccs format in three projects
* fix nss emails after rebase
* Openssl: Enable more configure options
This enables all the options that are off by default but that we still
want to test.
* openssl: Enable undefined sanitizer.
* openssl: Add the security security contact as auto Cc
* openssl: bignum: limit to 2048 bytes