main
hack: Support picking cc and cpp via environment variables.
Replace egrep with grep -E
Makefile: use libsqlite3 build when possible
Makefile: use hack/test-system.sh for test-system-local
Avoid hard-coding the location of bash
Speed up validate-git-marks by about a factor of three
Actually fail if (go vet) fails
Finally, eliminate hack/make.sh
Man page validation: part 2 of 2