The oss-fuzz documentation states that listing supported sanitizers in a project's yaml [is optional](https://google.github.io/oss-fuzz/getting-started/new-project-guide/#sanitizers). It appears that CIFuzz requires supported sanitizers to be included in this file ([ref](26e8d7c772/infra/cifuzz/cifuzz.py (L508-L529))). I believe this causes the CIFuzz Github Action to fail for projects that have not listed support for address sanitizer explicitly in their respective project YAML.
This PR explicitly defines support for asan and ubsan with a goal of fixing h2o's CIFuzz build
* [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
* passing smoke test
* integration complete pending PR to fix various issues on h2o side
* add libfuzzer options files
* remove redundant line of code
* simplify by specifying OPENSSL flag outside CMakeLists.txt; pass oss-fuzz CXXFLAGS in
* remove h2o upstream workaround patching; add dictionary support
* add license headers
Abhishek Arya