sslutil: more helpful fingerprint mismatch message
This will aid debugging for users of sites that renew certs.
i18n-pt_BR: synchronized with
0b05e0bfdc1c
scmutil: unify some 'no changes found' messages
This keeps the wording more consistent for secret csets
test-rebase-collapse: Add test for rebase regression introduced in
12309c09d19a