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/ip6tables-save.8 b/ip6tables-save.8
index c760b32..457be82 100644
--- a/ip6tables-save.8
+++ b/ip6tables-save.8
@@ -19,7 +19,7 @@
 .\"
 .\"
 .SH NAME
-ip6tables-save - dump iptables rules to stdout
+ip6tables-save \(em dump iptables rules to stdout
 .SH SYNOPSIS
 \fBip6tables\-save\fP [\fB\-M\fP \fImodprobe\fP] [\fB\-c\fP]
 [\fB\-t\fP \fItable\fP
@@ -46,7 +46,7 @@
 .br
 Andras Kis-Szabo <kisza@sch.bme.hu>
 .SH SEE ALSO
-.BR ip6tables-restore "(8), " ip6tables "(8) "
+\fBip6tables\-restore\fP(8), \fBip6tables\fP(8)
 .PP
 The iptables-HOWTO, which details more iptables usage, the NAT-HOWTO,
 which details NAT, and the netfilter-hacking-HOWTO which details the