Jon Callas wrote:
If it gets mangled by a transport, it doesn't cause
the protocol any problems.
In some environments, 0x8A translates to 0x0A/CRLF.
The KDE / Mime team discovered rfc2440 implementations
which emit comments in the native 8-bit charset.
This breaks Mime unless they re-encode the entire block
in radix-64, which conflicts with a PGP/Mime requirement
that certain OpenPGP Armored formats MUST be left in
their native "----- BEGIN ... ----- END" format.
They can't use the '=FF' mechanism because it would
encode the '=' terminators in the armor.
PGP/Mime needs its ASCII Armor to be pure 7-bit ASCII.