FIREHOL_LOG_PREFIX not applied to all log messages

[kb-elmo]

When setting FIREHOL_LOG_PREFIX in the config file I still get several log line in the iptables file that are missing the prefix.
The prefix is only applied to some of the log config lines.

Example from /etc/iptables/rules.v4:

[0:0] -A INPUT -m conntrack --ctstate INVALID -m limit --limit 1/sec -j LOG --log-prefix "\"firehol: DROP INVALID INPUT:"
[0:0] -A INPUT -m limit --limit 1/sec -j LOG --log-prefix "\"firehol: DROP UNMATCHED IN-u"
[0:0] -A FORWARD -m conntrack --ctstate INVALID -m limit --limit 1/sec -j LOG --log-prefix "\"DROP INVALID FORWARD:\""
[0:0] -A FORWARD -m limit --limit 1/sec -j LOG --log-prefix "\"firehol: DROP UNMATCHED PASS"
[0:0] -A OUTPUT -m conntrack --ctstate INVALID -m limit --limit 1/sec -j LOG --log-prefix "\"firehol: DROP INVALID OUTPUT"
[0:0] -A OUTPUT -m limit --limit 1/sec -j LOG --log-prefix "\"firehol: DROP UNMATCHED OUT-"
[0:0] -A in_intern -m conntrack --ctstate INVALID -m limit --limit 1/sec -j LOG --log-prefix "\"firehol: DROP INVALID in_int"
[0:0] -A in_intern -m limit --limit 1/sec -j LOG --log-prefix "\"firehol: DROP UNMATCHED IN-i"
[0:0] -A in_public4 -m conntrack --ctstate INVALID -m limit --limit 1/sec -j LOG --log-prefix "\"DROP INVALID in_public4:\""
[0:0] -A in_public4 -m limit --limit 1/sec -j LOG --log-prefix "\"reject UNMATCHED IN-public4:"
[0:0] -A out_intern -m conntrack --ctstate INVALID -m limit --limit 1/sec -j LOG --log-prefix "\"firehol: DROP INVALID out_in"
[0:0] -A out_intern -m limit --limit 1/sec -j LOG --log-prefix "\"firehol: DROP UNMATCHED OUT-"
[0:0] -A out_public4 -m conntrack --ctstate INVALID -m limit --limit 1/sec -j LOG --log-prefix "\"DROP INVALID out_public4:\""
[0:0] -A out_public4 -m limit --limit 1/sec -j LOG --log-prefix "\"reject UNMATCHED OUT-public4"

This causes incoherent logging and makes it impossible to properly route the firehol logs into their own file with rsyslog.