Lots of functions had really generic names (like 'makekey'), or names
that missed out an important concept (like 'rsakey_pubblob', which
loads a public blob from a _file_ and doesn't generate it from an
in-memory representation at all). Also, the opaque 'int order' that
distinguishes the two formats of public key blob is now a mnemonic
enumeration, and while I'm at it, rsa_ssh1_public_blob takes one of
those as an extra argument.
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