man: fix incorrect use of "it's"
A couple of places were using "it's" where possive form "its"
should be used instead.
diff --git a/man/man7/tc-hfsc.7 b/man/man7/tc-hfsc.7
index eff8a0f..d4e63f2 100644
--- a/man/man7/tc-hfsc.7
+++ b/man/man7/tc-hfsc.7
@@ -320,7 +320,7 @@
if current real time is bigger than fit\-time ('ft'). So the modified LS
criterion becomes: choose the smallest virtual time from all active children,
such that fit\-time < current real time also holds. Fit\-time is calculated
-from F(), which is based on UL service curve. As you can see, it's role is
+from F(), which is based on UL service curve. As you can see, its role is
kinda similar to E() used in RT criterion. Also, for obvious reasons \- you
can't specify UL service curve without LS one.
diff --git a/man/man8/ip-netns.8 b/man/man8/ip-netns.8
index 7fe9eb9..349ee7e 100644
--- a/man/man8/ip-netns.8
+++ b/man/man8/ip-netns.8
@@ -25,7 +25,7 @@
.SH DESCRIPTION
A network namespace is logically another copy of the network stack,
-with it's own routes, firewall rules, and network devices.
+with its own routes, firewall rules, and network devices.
By convention a named network namespace is an object at
.BR "/var/run/netns/" NAME
