I managed to build from completely the wrong commit this morning, so
make sure to double-check next time!
`build.out/putty', and provide link maps and sign.sh alongside that
in build.out.
+ - Double-check in build.log that the release was built from the right
+ git commit.
+
- Do a bit of checking that the release binaries basically work,
report their version numbers accurately, and so on. Test the
installer and the Unix source tarball.