major manpage update (Yasuyuki Kozakai)
diff --git a/extensions/libipt_esp.man b/extensions/libipt_esp.man
index 7b84368..7898e02 100644
--- a/extensions/libipt_esp.man
+++ b/extensions/libipt_esp.man
@@ -1,3 +1,3 @@
-This module matches the SPIs in ESP header of IPSec packets.
+This module matches the SPIs in ESP header of IPsec packets.
 .TP
 .BR "--espspi " "[!] \fIspi\fP[:\fIspi\fP]"