Fix everything that previously referred to src/or

Doxyfile.in

configure.ac

doc/HACKING/Module.md

doc/HACKING/Tracing.md

scripts/maint/fallback.whitelist

scripts/maint/updateFallbackDirs.py

scripts/test/coverage

src/core/or/git_revision.c

src/rust/external/external.rs

src/rust/protover/ffi.rs

src/rust/protover/protover.rs

src/rust/tor_log/tor_log.rs

src/test/test-network.sh

src/test/test_bridges.c

src/test/test_router.c