Sync both the content and style of `shutdown -h` and `man shutdown`.

http://bugs.gentoo.org/91724

--- man/shutdown.8
+++ man/shutdown.8
@@ -11,7 +11,7 @@
 .B /sbin/shutdown
+.RB [ \-akrhPHfFnc ]
 .RB [ \-t
 .IR sec ]
-.RB [ \-arkhncfFHP ]
 .I time
-.RI [ warning-message ]
+.RI [ "warning message" ]
 .\"}}}
@@ -41,7 +41,2 @@
 .\"}}}
-.\"{{{  -t sec
-.IP "\fB\-t\fP \fIsec\fP"
-Tell \fBinit\fP(8) to wait \fIsec\fP seconds between sending processes the 
-warning and the kill signal, before changing to another runlevel.
-.\"}}}
 .\"{{{  -k
@@ -58,7 +53,2 @@
 .\"}}}
-.\"{{{  -H
-.IP \fB\-H\fP
-Halt action is to halt or drop into boot monitor on systems that
-support it.
-.\"}}}
 .\"{{{  -P
@@ -67,7 +57,6 @@
 .\"}}}
-.\"{{{  -n
-.IP \fB\-n\fP
-[DEPRECATED] Don't call \fBinit\fP(8) to do the shutdown but do it ourself.
-The use of this option is discouraged, and its results are not always what
-you'd expect.
+.\"{{{  -H
+.IP \fB\-H\fP
+Halt action is to halt or drop into boot monitor on systems that
+support it.
 .\"}}}
@@ -81,2 +70,8 @@
 .\"}}}
+.\"{{{  -n
+.IP \fB\-n\fP
+[DEPRECATED] Don't call \fBinit\fP(8) to do the shutdown but do it ourself.
+The use of this option is discouraged, and its results are not always what
+you'd expect.
+.\"}}}
 .\"{{{  -c
@@ -87,2 +82,7 @@
 .\"}}}
+.\"{{{  -t sec
+.IP "\fB\-t\fP \fIsec\fP"
+Tell \fBinit\fP(8) to wait \fIsec\fP seconds between sending processes the 
+warning and the kill signal, before changing to another runlevel.
+.\"}}}
 .\"{{{  time
@@ -92,3 +92,3 @@
 .\"{{{  warning-message
-.IP \fIwarning-message\fP
+.IP "\fIwarning message\fP"
 Message to send to all users.
--- src/shutdown.c
+++ src/shutdown.c
@@ -104,3 +104,3 @@
 	fprintf(stderr,
-	"Usage:\t  shutdown [-akrhHPfnc] [-t secs] time [warning message]\n"
+	"Usage:\t  shutdown [-akrhPHfFnc] [-t sec] time [warning message]\n"
 	"\t\t  -a:      use /etc/shutdown.allow\n"