Merge branch 'maint-0.4.3' into maint-0.4.4

changes/ticket40133

src/core/or/protover.c

src/rust/protover/errors.rs

src/rust/protover/protoset.rs

src/rust/protover/protover.rs

src/rust/protover/tests/protover.rs

src/test/test_protover.c