doc: mention other possible nf_loggers for TRACE

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

diff --git a/extensions/libxt_TRACE.man b/extensions/libxt_TRACE.man
index d28c3a0c39b9a3058b71bfc9130c5be16888a461..ea0ce0fa4eb3456a335b4bf8944ea3847bafa81d 100644 (file)
--- a/extensions/libxt_TRACE.man
+++ b/extensions/libxt_TRACE.man
@@ -1,7 +1,9 @@
 This target marks packes so that the kernel will log every rule which match 
-the packets as those traverse the tables, chains, rules. (The ipt_LOG or
-ip6t_LOG module 
-is required for the logging.) The packets are logged with the string prefix: 
+the packets as those traverse the tables, chains, rules.
+.PP
+A logging backend, such as ip(6)t_LOG or nfnetlink_log, must be loaded for this
+to be visible.
+The packets are logged with the string prefix:
 "TRACE: tablename:chainname:type:rulenum " where type can be "rule" for 
 plain rule, "return" for implicit rule at the end of a user defined chain 
 and "policy" for the policy of the built in chains.