[iptables PATCH 2/4] man: *NAT: Review --random* option descriptions

[Phil Sutter <phil@nwl.cc>]

Stating the option again in the first (single?) sentence is pointless.
Get rid of that initial half-sentence in MASQUERADE options and unify
the texts a bit.

Signed-off-by: Phil Sutter <phil@nwl.cc>
---
 extensions/libxt_DNAT.man       |  4 +---
 extensions/libxt_MASQUERADE.man | 10 ++--------
 extensions/libxt_REDIRECT.man   |  4 +---
 extensions/libxt_SNAT.man       |  8 ++------
 4 files changed, 6 insertions(+), 20 deletions(-)

diff --git a/extensions/libxt_DNAT.man b/extensions/libxt_DNAT.man
index 12d334af5a479..af9a3f06f6aaf 100644
--- a/extensions/libxt_DNAT.man
+++ b/extensions/libxt_DNAT.man
@@ -25,9 +25,7 @@ For a single port or \fIbaseport\fP, a service name as listed in
 \fB/etc/services\fP may be used.
 .TP
 \fB\-\-random\fP
-If option
-\fB\-\-random\fP
-is used then port mapping will be randomized (kernel >= 2.6.22).
+Randomize source port mapping (kernel >= 2.6.22).
 .TP
 \fB\-\-persistent\fP
 Gives a client the same source-/destination-address for each connection.
diff --git a/extensions/libxt_MASQUERADE.man b/extensions/libxt_MASQUERADE.man
index 7746f4734a31a..26d91ddba6b15 100644
--- a/extensions/libxt_MASQUERADE.man
+++ b/extensions/libxt_MASQUERADE.man
@@ -20,16 +20,10 @@ if the rule also specifies one of the following protocols:
 \fBtcp\fP, \fBudp\fP, \fBdccp\fP or \fBsctp\fP.
 .TP
 \fB\-\-random\fP
-Randomize source port mapping
-If option
-\fB\-\-random\fP
-is used then port mapping will be randomized (kernel >= 2.6.21).
+Randomize source port mapping (kernel >= 2.6.21).
 Since kernel 5.0, \fB\-\-random\fP is identical to \fB\-\-random-fully\fP.
 .TP
 \fB\-\-random-fully\fP
-Full randomize source port mapping
-If option
-\fB\-\-random-fully\fP
-is used then port mapping will be fully randomized (kernel >= 3.13).
+Fully randomize source port mapping (kernel >= 3.13).
 .TP
 IPv6 support available since Linux kernels >= 3.7.
diff --git a/extensions/libxt_REDIRECT.man b/extensions/libxt_REDIRECT.man
index 10305597f87a3..1cbdb9bae988c 100644
--- a/extensions/libxt_REDIRECT.man
+++ b/extensions/libxt_REDIRECT.man
@@ -19,8 +19,6 @@ if the rule also specifies one of the following protocols:
 For a single port, a service name as listed in \fB/etc/services\fP may be used.
 .TP
 \fB\-\-random\fP
-If option
-\fB\-\-random\fP
-is used then port mapping will be randomized (kernel >= 2.6.22).
+Randomize source port mapping (kernel >= 2.6.22).
 .TP
 IPv6 support available starting Linux kernels >= 3.7.
diff --git a/extensions/libxt_SNAT.man b/extensions/libxt_SNAT.man
index 087664471d110..80a698a64738b 100644
--- a/extensions/libxt_SNAT.man
+++ b/extensions/libxt_SNAT.man
@@ -21,14 +21,10 @@ will be mapped to ports below 1024, and other ports will be mapped to
 1024 or above. Where possible, no port alteration will occur.
 .TP
 \fB\-\-random\fP
-If option
-\fB\-\-random\fP
-is used then port mapping will be randomized through a hash-based algorithm (kernel >= 2.6.21).
+Randomize source port mapping through a hash-based algorithm (kernel >= 2.6.21).
 .TP
 \fB\-\-random-fully\fP
-If option
-\fB\-\-random-fully\fP
-is used then port mapping will be fully randomized through a PRNG (kernel >= 3.14).
+Fully randomize source port mapping through a PRNG (kernel >= 3.14).
 .TP
 \fB\-\-persistent\fP
 Gives a client the same source-/destination-address for each connection.
-- 
2.34.1