D24216.diff
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	Index: head/share/man/man4/tcp.4
	===================================================================
	--- head/share/man/man4/tcp.4
	+++ head/share/man/man4/tcp.4
	@@ -34,7 +34,7 @@
	.\" From: @(#)tcp.4 8.1 (Berkeley) 6/5/93
	.\" $FreeBSD$
	.\"
	-.Dd December 2, 2019
	+.Dd March 29, 2020
	.Dt TCP 4
	.Os
	.Sh NAME
	@@ -632,7 +632,12 @@
	In case of retransmits OS will
	lower the MSS to check if it's MTU problem.
	If current MSS is greater than
	-configured value to try, it will be set to configured value, otherwise,
	+configured value to try
	+.Po Va net.inet.tcp.pmtud_blackhole_mss
	+and
	+.Va net.inet.tcp.v6pmtud_blackhole_mss
	+.Pc ,
	+it will be set to this value, otherwise,
	MSS will be set to default values
	.Po Va net.inet.tcp.mssdflt
	and
	@@ -642,13 +647,6 @@
	MSS to try for IPv4 if PMTU blackhole detection is turned on.
	.It Va v6pmtud_blackhole_mss
	MSS to try for IPv6 if PMTU blackhole detection is turned on.
	-.It Va pmtud_blackhole_activated
	-Number of times configured values were used in an attempt to downshift.
	-.It Va pmtud_blackhole_activated_min_mss
	-Number of times default MSS was used in an attempt to downshift.
	-.It Va pmtud_blackhole_failed
	-Number of connections for which retransmits continued even after MSS
	-downshift.
	.It Va functions_available
	List of available TCP function blocks (TCP stacks).
	.It Va functions_default