Code style

#guides

.c Drew DeVault https://git.sr.ht/~sircmpwn/cstyle/tree/master/README.md
.c Linux Kernel https://www.kernel.org/doc/Documentation/process/coding-style.rst
.go Code review comments https://github.com/golang/go/wiki/CodeReviewComments
.py PEP 8 https://www.python.org/dev/peps/pep-0008/