Add option to syslogd(8) to supress adding "Forwarded from" string for forwarded remote messages

[sergey_akhmatov.ru]

Summary

When forwarding messages received from remote host syslogd(8) adds "Forwarded from" string to messages unconditionally. It may be undesired.
Inspired by IBM syslogd option -n ( https://www.ibm.com/support/knowledgecenter/en/ssw_aix_71/com.ibm.aix.cmds5/syslogd.htm ) I would like to add similar option to BSD syslogd.

I had hard time choosing option name, would like to hear any suggestions.

Test Plan

add "*.* @<remote_ip>" entry to syslog.conf
start "syslogd -a 0/0:*" to receive remote messages
send message with logger(1) from remote host.
ensure that messages are forwarded, "Forwarded from" string is appended before hostname

Repeat with -t option
Ensure "Forwared from" is supressed.