random.mersenne-twister: Don't use system-random-generator to initialize
Mersenne Twister. If there is no system random generator, startup can
fail.
vm: jit::jit is a c++ constructor but it does not allocate objects to the Factor heaps.
Add annotations for gc allocating.
html.parser.analyzer: when matching on classname, check that the tag has the given class
html.parser.analyzer: cleanup, fix find-by-class-id-between.
sorting: simpler check-bounds.
checksums: simplify add-checksum-bytes.
checksums.sha: more types, faster.
checksums.md5: more types and inline, lots faster.