manpages: more fixes to minuses, hyphens, dashes

Debian still carries patches patches to the iptables nroff code touching
ASCII minuses, so I thought, what's it this time.

Eventually, this patch tries to straighten things once more, per
http://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style#Hyphens and
http://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style#Dashes .

Titles will get the em dash; all typed commands or parameters with a
hyphen get a minus (so that man(1) hyperlinking and copy-pasting does
work), but other mentions get the hyphen.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/iptables.8.in b/iptables.8.in
index cb6e6b0..6125e65 100644
--- a/iptables.8.in
+++ b/iptables.8.in
@@ -23,7 +23,7 @@
 .\"
 .\"
 .SH NAME
-iptables - administration tool for IPv4 packet filtering and NAT
+iptables \(em administration tool for IPv4 packet filtering and NAT
 .SH SYNOPSIS
 \fBiptables\fP [\fB\-t\fP \fItable\fP] {\fB\-A\fP|\fB\-D\fP} \fIchain\fP \fIrule-specification\fP
 .PP
@@ -182,7 +182,7 @@
 .TP
 \fB\-S\fP, \fB\-\-list\-rules\fP [\fIchain\fP]
 Print all rules in the selected chain.  If no chain is selected, all
-chains are printed like iptables\-save. Like every other iptables command,
+chains are printed like iptables-save. Like every other iptables command,
 it applies to the specified table (filter is the default).
 .TP
 \fB\-F\fP, \fB\-\-flush\fP [\fIchain\fP]