Don't add TZUTC kludge lines to exported netmail and echomail messages when
there is already a TZUTC FidoNet control line in the message header (unexpected
but apparently, GoldEd+ does this).
If there are other duplicate FTN control/kludge lines created by SBBSecho
exporting messages added to SMBs by GoldEd+, we should address those too, even
though I believe in most cases, you should configure the editor to *not* add
these header fields in the first place.
Do not convert exisiting Origin Line's to effectively comments (replacing *
with # in " * Origin") if the current sub-board has been configured to not add
network tag/origin-lines.