2) insert a new subsection of section 3 titled "Differences with
RFC1421 PEM formats" containing the following text or equivalent:
Implemetors should take care to notice that while the format is
superficially similar to that specified by PEM [RFC1421] and PGP
[RFC1991], it is not identical; most notably:
1) The other specifications use different BEGIN/END delimeters (five
dashes, no space rather than four dashes and a space).
2) there is no blank line before the start of the base64-encoded
contents.