In 'Configuring interfaces' section, 'iff' should be 'if'.

Notes:
Tue May 29 14:23:40 EDT 2012 geoff
    `iff' is a mathematical term of art, meaning `if and only if'.


Reference: /n/sources/patch/sorry/man-3-ip-if
Date: Mon May 28 22:31:22 CES 2012
Signed-off-by: djc@9grid.fr
Reviewed-by: geoff

--- /sys/man/3/ip	Mon May 28 22:31:09 2012
+++ /sys/man/3/ip	Mon May 28 22:31:04 2012
@@ -278,7 +278,7 @@
 .IR keyword s
 and the meanings of their values follow.
 See RFC 2461 §6.2.1 for more detail.
-Flags are true iff non-zero.
+Flags are true if non-zero.
 .RS
 .TF "\fLreachtime\fR"
 .TP