Fix various typos and nitpicks

Fix typo in ss manpage.
Make the backslash visible in ip manpage (http://bugs.debian.org/285507).
Strict syntax for ip addr advice in error message.
Fix typo in libnetlink(3) manpage (writen -> written).
Fix typos in tc-prio(8) manpage.
Fix typo in tc-htb(8) manpage (mininum -> minimum).
Fix typo in tc-cbq-details(8) manpage (occured -> occurred).

Signed-off-by: Andreas Henriksson <andreas@fatal.se>
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index 518d8cd..d1c6620 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -1019,7 +1019,7 @@
 		return ipaddr_list_or_flush(argc-1, argv+1, 1);
 	if (matches(*argv, "help") == 0)
 		usage();
-	fprintf(stderr, "Command \"%s\" is unknown, try \"ip address help\".\n", *argv);
+	fprintf(stderr, "Command \"%s\" is unknown, try \"ip addr help\".\n", *argv);
 	exit(-1);
 }