incorporate fixes from 8.6.11

multiple glitches in 8.6.10 -- see ../RELEASE_NOTES for details

cleanup to make gcc -Winitialized happier

fix security problem allowing bogus lines to be written to qf file
from command line or IDENT protocol by embedding newlines

fix security problem: avoid newlines in command line or IDENT input

cut at 20 January version of DSN document

generalize queue order configuration

log transaction delay as well as queue delay (for ordering lists)

get ORCPT= ESMTP DSN parameter working

oops.... off by one error

save OMTS and ENVID parameters in queue file

clean up several small problems with file delivery, error detection,
and return receipts

convert to new DSN draft

remove Content-Type: header from returned messages if and only if
no body is to be returned -- this could confuse mail readers

include sequence number in queue runs

first cut at DSN implementation

attempt to allow udb rewriting of envelope senders; still not
quite right, but I can't really test it without a network connection

repair MinQueueAge code

implement minimum queue age between deliveries

store dev information in qf file; add RFC 1428-specified
Content-Type: text/plain; charset=unknown-8bit header to messages
being converted from 8 -> 7 bit with no specific Content-Type

add comment about device major/minor info

DECWRL extensions to qf file

allow sorting by host name instead of by message priority

tweaks & bug fixes to MIME algorithm

MIME 8 to 7 bit support