https://gitlab.synchro.net/main/sbbs/-/commit/e6d8053f3457d19d0e456ddb
Modified Files:
	src/sbbs3/mailsrvr.c
Log Message:
Report bigger "size of message" in POP3 LIST response

For messages that have no body, we'd report 0. But RFC 1939 says this value
is supposed to be "the exact size of the message in octets" . This
would include header fields, so while we can't know the exact RFC822 size,
adding the msg's hdr.length to these values gives size > 0 for messages
with no body text and this enables the Apple iPhone Mail app to download
the message (fixing issue #822).

Part two of this fix is to provide a blank line of message text when there
is none. This changes the message displayed in the iPhone Mail app from:

"This message cannot be displayed because of the way it is formatted.
 Ask the sender to send it again using a different format or email program.

 text/plain"

to (the much nicer):
 "This message has no content".
--- SBBSecho 3.21-Linux