help.lint.checks: remove leaks check for now due to bootstrap issues.
io: change with-output-stream* example to unchecked.
vocabs.files: change vocab-tests example to sort output.
imap: Fix docs referring to wrong boot rc file.
tools.scaffold: Add word to scaffold a mason rc file.
mason.test: Allow for a .factor-mason-rc which is loaded by maason.test.
smtp: Use a config object. Fix docs. Fix unit tests.